Base | Representation |
---|---|
bin | 1111101001001… |
… | …10110100110110 |
3 | 100010221020010112 |
4 | 13310212310312 |
5 | 232043343110 |
6 | 21004423022 |
7 | 3152305520 |
oct | 764466466 |
9 | 303836115 |
10 | 131231030 |
11 | 680928a7 |
12 | 37b47a72 |
13 | 21259bc8 |
14 | 13600a10 |
15 | b7c3405 |
hex | 7d26d36 |
131231030 has 16 divisors (see below), whose sum is σ = 269961120. Its totient is φ = 44993472.
The previous prime is 131231027. The next prime is 131231039. The reversal of 131231030 is 30132131.
It is a Harshad number since it is a multiple of its sum of digits (14).
It is a junction number, because it is equal to n+sod(n) for n = 131230996 and 131231014.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (131231039) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937295 + ... + 937434.
It is an arithmetic number, because the mean of its divisors is an integer number (16872570).
Almost surely, 2131231030 is an apocalyptic number.
131231030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
131231030 is an abundant number, since it is smaller than the sum of its proper divisors (138730090).
131231030 is a wasteful number, since it uses less digits than its factorization.
131231030 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1874743.
The product of its (nonzero) digits is 54, while the sum is 14.
The square root of 131231030 is about 11455.6112887964. The cubic root of 131231030 is about 508.1736933688.
Adding to 131231030 its reverse (30132131), we get a palindrome (161363161).
The spelling of 131231030 in words is "one hundred thirty-one million, two hundred thirty-one thousand, thirty".
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