31550640625 has 105 divisors (see below), whose sum is σ = 47649214301. Its totient is φ = 20888700000.

The previous prime is 31550640599. The next prime is 31550640677. The reversal of 31550640625 is 52604605513.

The square root of 31550640625 is 177625.

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

It can be written as a sum of positive squares in 10 ways, for example, as 26736501169 + 4814139456 = 163513^2 + 69384^2 .

It is not a de Polignac number, because 31550640625 - 2⁵ = 31550640593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 104 ways as a sum of consecutive naturals, for example, 1087953111 + ... + 1087953139.

Almost surely, 2^31550640625 is an apocalyptic number.

31550640625 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

31550640625 is the 177625-th square number.

31550640625 is the 88813-rd centered octagonal number.

It is an amenable number.

31550640625 is a deficient number, since it is larger than the sum of its proper divisors (16098573676).

31550640625 is an frugal number, since it uses more digits than its factorization.

31550640625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 31550640625 in words is "thirty-one billion, five hundred fifty million, six hundred forty thousand, six hundred twenty-five".