31195396272 has 20 divisors (see below), whose sum is σ = 80588107160. Its totient is φ = 10398465408.

The previous prime is 31195396261. The next prime is 31195396291. The reversal of 31195396272 is 27269359113.

It is a super-2 number, since 2×31195396272² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 649904089 = 31195396272 / (3 + 1 + 1 + 9 + 5 + 3 + 9 + 6 + 2 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324951997 + ... + 324952092.

It is an arithmetic number, because the mean of its divisors is an integer number (4029405358).

Almost surely, 2^31195396272 is an apocalyptic number.

It is an amenable number.

31195396272 is an abundant number, since it is smaller than the sum of its proper divisors (49392710888).

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

31195396272 is a wasteful number, since it uses less digits than its factorization.

31195396272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649904100 (or 649904094 counting only the distinct ones).

The product of its digits is 612360, while the sum is 48.

The spelling of 31195396272 in words is "thirty-one billion, one hundred ninety-five million, three hundred ninety-six thousand, two hundred seventy-two".