31400262731 has 12 divisors (see below), whose sum is σ = 32460208776. Its totient is φ = 30373904160.

The previous prime is 31400262727. The next prime is 31400262763. The reversal of 31400262731 is 13726200413.

It is a happy number.

It is not a de Polignac number, because 31400262731 - 2² = 31400262727 is a prime.

It is a super-2 number, since 2×31400262731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31400262694 and 31400262703.

It is not an unprimeable number, because it can be changed into a prime (31400262631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2687855 + ... + 2699511.

It is an arithmetic number, because the mean of its divisors is an integer number (2705017398).

Almost surely, 2^31400262731 is an apocalyptic number.

31400262731 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31400262731 is a deficient number, since it is larger than the sum of its proper divisors (1059946045).

31400262731 is a wasteful number, since it uses less digits than its factorization.

31400262731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14522 (or 14491 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The spelling of 31400262731 in words is "thirty-one billion, four hundred million, two hundred sixty-two thousand, seven hundred thirty-one".