31325604156 has 288 divisors, whose sum is σ = 101414476800. Its totient is φ = 8081942400.

The previous prime is 31325604151. The next prime is 31325604157. The reversal of 31325604156 is 65140652313.

31325604156 is a `hidden beast` number, since 3 + 1 + 3 + 2 + 560 + 41 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 31325604156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31325604151) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22682586 + ... + 22683966.

It is an arithmetic number, because the mean of its divisors is an integer number (352133600).

Almost surely, 2^31325604156 is an apocalyptic number.

31325604156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31325604156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50707238400).

31325604156 is an abundant number, since it is smaller than the sum of its proper divisors (70088872644).

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

31325604156 is a wasteful number, since it uses less digits than its factorization.

31325604156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590 (or 1571 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 31325604156 in words is "thirty-one billion, three hundred twenty-five million, six hundred four thousand, one hundred fifty-six".