31171427056 has 80 divisors (see below), whose sum is σ = 79260284160. Its totient is φ = 11505507840.

The previous prime is 31171426991. The next prime is 31171427093. The reversal of 31171427056 is 65072417113.

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 15 ways as a sum of consecutive naturals, for example, 642421 + ... + 689236.

It is an arithmetic number, because the mean of its divisors is an integer number (990753552).

Almost surely, 2^31171427056 is an apocalyptic number.

It is an amenable number.

31171427056 is an abundant number, since it is smaller than the sum of its proper divisors (48088857104).

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

31171427056 is a wasteful number, since it uses less digits than its factorization.

31171427056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331702 (or 1331696 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 31171427056 in words is "thirty-one billion, one hundred seventy-one million, four hundred twenty-seven thousand, fifty-six".