31725525 has 36 divisors (see below), whose sum is σ = 56820768. Its totient is φ = 15612480.

The previous prime is 31725521. The next prime is 31725557. The reversal of 31725525 is 52552713.

It is not a de Polignac number, because 31725525 - 2² = 31725521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31725492 and 31725501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31725521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11424 + ... + 13926.

Almost surely, 2^31725525 is an apocalyptic number.

It is an amenable number.

31725525 is a deficient number, since it is larger than the sum of its proper divisors (25095243).

31725525 is a wasteful number, since it uses less digits than its factorization.

31725525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542 (or 2524 counting only the distinct ones).

The product of its digits is 10500, while the sum is 30.

The square root of 31725525 is about 5632.5416110314. The cubic root of 31725525 is about 316.5698904027.

The spelling of 31725525 in words is "thirty-one million, seven hundred twenty-five thousand, five hundred twenty-five".