Base | Representation |
---|---|
bin | 11100111001001000… |
… | …100111001011101110 |
3 | 2222002001212110021100 |
4 | 130321020213023232 |
5 | 1002013433030110 |
6 | 22130225343530 |
7 | 2145533645220 |
oct | 347110471356 |
9 | 88061773240 |
10 | 31023330030 |
11 | 1217a952030 |
12 | 6019797ba6 |
13 | 2c053b0324 |
14 | 170430a410 |
15 | c188b7bc0 |
hex | 7392272ee |
31023330030 has 96 divisors (see below), whose sum is σ = 100563959808. Its totient is φ = 6446404800.
The previous prime is 31023329993. The next prime is 31023330043. The reversal of 31023330030 is 3003332013.
31023330030 is a `hidden beast` number, since 310 + 23 + 3 + 300 + 30 = 666.
It is a super-3 number, since 3×310233300303 (a number of 32 digits) contains 333 as substring.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a junction number, because it is equal to n+sod(n) for n = 31023329985 and 31023330012.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2231406 + ... + 2245265.
It is an arithmetic number, because the mean of its divisors is an integer number (1047541248).
Almost surely, 231023330030 is an apocalyptic number.
31023330030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.
31023330030 is an abundant number, since it is smaller than the sum of its proper divisors (69540629778).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
31023330030 is a wasteful number, since it uses less digits than its factorization.
31023330030 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4476702 (or 4476699 counting only the distinct ones).
The product of its (nonzero) digits is 486, while the sum is 18.
Adding to 31023330030 its reverse (3003332013), we get a palindrome (34026662043).
The spelling of 31023330030 in words is "thirty-one billion, twenty-three million, three hundred thirty thousand, thirty".
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