| Base | Representation |
|---|---|
| bin | 100100101100001… |
| … | …0100110001110010 |
| 3 | 10011210120001000000 |
| 4 | 1021120110301302 |
| 5 | 10010131111310 |
| 6 | 322055010430 |
| 7 | 42336201456 |
| oct | 11130246162 |
| 9 | 3153501000 |
| 10 | 1231113330 |
| 11 | 581a27737 |
| 12 | 2a4369a16 |
| 13 | 168099135 |
| 14 | b970c666 |
| 15 | 731344c0 |
| hex | 49614c72 |
1231113330 has 112 divisors (see below), whose sum is σ = 3358666584. Its totient is φ = 324725760.
The previous prime is 1231113329. The next prime is 1231113337. The reversal of 1231113330 is 333111321.
It is a happy number.
1231113330 is a `hidden beast` number, since 12 + 311 + 13 + 330 = 666.
It can be written as a sum of positive squares in 4 ways, for example, as 518063121 + 713050209 = 22761^2 + 26703^2 .
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (1231113337) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 706260 + ... + 708000.
Almost surely, 21231113330 is an apocalyptic number.
1231113330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 1231113330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679333292).
1231113330 is an abundant number, since it is smaller than the sum of its proper divisors (2127553254).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1231113330 is an equidigital number, since it uses as much as digits as its factorization.
1231113330 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1863 (or 1848 counting only the distinct ones).
The product of its (nonzero) digits is 162, while the sum is 18.
The square root of 1231113330 is about 35087.2245981354. The cubic root of 1231113330 is about 1071.7644425859.
Adding to 1231113330 its reverse (333111321), we get a palindrome (1564224651).
The spelling of 1231113330 in words is "one billion, two hundred thirty-one million, one hundred thirteen thousand, three hundred thirty".
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