Base | Representation |
---|---|
bin | 11101001101110111… |
… | …100101101001101000 |
3 | 2222222022102111211222 |
4 | 131031313211221220 |
5 | 1003222011020330 |
6 | 22224533241212 |
7 | 2160256463645 |
oct | 351567455150 |
9 | 88868374758 |
10 | 31371188840 |
11 | 12339244552 |
12 | 60b6193208 |
13 | 2c5c496a44 |
14 | 17385badcc |
15 | c391cc0e5 |
hex | 74dde5a68 |
31371188840 has 32 divisors (see below), whose sum is σ = 70590216960. Its totient is φ = 12547579200.
The previous prime is 31371188801. The next prime is 31371188851. The reversal of 31371188840 is 4888117313.
It is a junction number, because it is equal to n+sod(n) for n = 31371188791 and 31371188800.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1082945 + ... + 1111535.
It is an arithmetic number, because the mean of its divisors is an integer number (2205944280).
Almost surely, 231371188840 is an apocalyptic number.
It is an amenable number.
31371188840 is an abundant number, since it is smaller than the sum of its proper divisors (39219028120).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
31371188840 is a wasteful number, since it uses less digits than its factorization.
31371188840 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 56033 (or 56029 counting only the distinct ones).
The product of its (nonzero) digits is 129024, while the sum is 44.
The spelling of 31371188840 in words is "thirty-one billion, three hundred seventy-one million, one hundred eighty-eight thousand, eight hundred forty".
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