31171668025 has 9 divisors (see below), whose sum is σ = 38653963023. Its totient is φ = 24936628200.

The previous prime is 31171668019. The next prime is 31171668037. The reversal of 31171668025 is 52086617113.

It is a happy number.

The square root of 31171668025 is 176555.

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., 11221800489 + 19949867536 = 105933^2 + 141244^2 .

It is not a de Polignac number, because 31171668025 - 2¹¹ = 31171665977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 865120 + ... + 900430.

Almost surely, 2^31171668025 is an apocalyptic number.

31171668025 is the 176555-th square number.

31171668025 is the 88278-th centered octagonal number.

It is an amenable number.

31171668025 is a deficient number, since it is larger than the sum of its proper divisors (7482294998).

31171668025 is an frugal number, since it uses more digits than its factorization.

31171668025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70632 (or 35316 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 31171668025 in words is "thirty-one billion, one hundred seventy-one million, six hundred sixty-eight thousand, twenty-five".