31956925225 has 9 divisors (see below), whose sum is σ = 39627695653. Its totient is φ = 25564825120.

The previous prime is 31956925223. The next prime is 31956925283. The reversal of 31956925225 is 52252965913.

The square root of 31956925225 is 178765.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3680484889 + 28276440336 = 60667^2 + 168156^2 .

It is not a de Polignac number, because 31956925225 - 2¹ = 31956925223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31956925223) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 875949 + ... + 911701.

Almost surely, 2^31956925225 is an apocalyptic number.

31956925225 is the 178765-th square number.

31956925225 is the 89383-rd centered octagonal number.

It is an amenable number.

31956925225 is a deficient number, since it is larger than the sum of its proper divisors (7670770428).

31956925225 is an frugal number, since it uses more digits than its factorization.

31956925225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71516 (or 35758 counting only the distinct ones).

The product of its digits is 1458000, while the sum is 49.

Multiplying 31956925225 by its sum of digits (49), we get a square (1565889336025 = 1251355²).

The spelling of 31956925225 in words is "thirty-one billion, nine hundred fifty-six million, nine hundred twenty-five thousand, two hundred twenty-five".