31979025 has 81 divisors (see below), whose sum is σ = 64235379. Its totient is φ = 15200640.

The previous prime is 31978979. The next prime is 31979029. The reversal of 31979025 is 52097913.

The square root of 31979025 is 5655.

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

It can be written as a sum of positive squares in 13 ways, for example, as 29582721 + 2396304 = 5439^2 + 1548^2 .

It is not a de Polignac number, because 31979025 - 2¹³ = 31970833 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31979029) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1102711 + ... + 1102739.

Almost surely, 2^31979025 is an apocalyptic number.

31979025 is the 5655-th square number.

31979025 is the 2828-th centered octagonal number.

It is an amenable number.

31979025 is an abundant number, since it is smaller than the sum of its proper divisors (32256354).

31979025 is a wasteful number, since it uses less digits than its factorization.

31979025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The cubic root of 31979025 is about 317.4108291135.

Multiplying 31979025 by its sum of digits (36), we get a square (1151244900 = 33930²).

The spelling of 31979025 in words is "thirty-one million, nine hundred seventy-nine thousand, twenty-five".