31118371216 has 15 divisors (see below), whose sum is σ = 60293211393. Its totient is φ = 15558832800.

The previous prime is 31118371201. The next prime is 31118371217. The reversal of 31118371216 is 61217381113.

It is a happy number.

The square root of 31118371216 is 176404.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 31115548816 + 2822400 = 176396^2 + 1680^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31118371217) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 683566 + ... + 727666.

Almost surely, 2^31118371216 is an apocalyptic number.

31118371216 is the 176404-th square number.

It is an amenable number.

31118371216 is a deficient number, since it is larger than the sum of its proper divisors (29174840177).

31118371216 is an frugal number, since it uses more digits than its factorization.

31118371216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88210 (or 44103 counting only the distinct ones).

The product of its digits is 6048, while the sum is 34.

The spelling of 31118371216 in words is "thirty-one billion, one hundred eighteen million, three hundred seventy-one thousand, two hundred sixteen".