31311956040 has 64 divisors (see below), whose sum is σ = 93962376000. Its totient is φ = 8347498752.

The previous prime is 31311956029. The next prime is 31311956147. The reversal of 31311956040 is 4065911313.

It is a junction number, because it is equal to n+sod(n) for n = 31311955992 and 31311956010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413011 + ... + 482909.

It is an arithmetic number, because the mean of its divisors is an integer number (1468162125).

Almost surely, 2^31311956040 is an apocalyptic number.

31311956040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31311956040 is an abundant number, since it is smaller than the sum of its proper divisors (62650419960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31311956040 is a wasteful number, since it uses less digits than its factorization.

31311956040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73646 (or 73642 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The spelling of 31311956040 in words is "thirty-one billion, three hundred eleven million, nine hundred fifty-six thousand, forty".