31916271156 has 144 divisors (see below), whose sum is σ = 94428246528. Its totient is φ = 8212184640.

The previous prime is 31916271137. The next prime is 31916271157. The reversal of 31916271156 is 65117261913.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31916271157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1072875 + ... + 1102221.

It is an arithmetic number, because the mean of its divisors is an integer number (655751712).

Almost surely, 2^31916271156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31916271156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47214123264).

31916271156 is an abundant number, since it is smaller than the sum of its proper divisors (62511975372).

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

31916271156 is a wasteful number, since it uses less digits than its factorization.

31916271156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29490 (or 29477 counting only the distinct ones).

The product of its digits is 68040, while the sum is 42.

The spelling of 31916271156 in words is "thirty-one billion, nine hundred sixteen million, two hundred seventy-one thousand, one hundred fifty-six".