31965225 has 24 divisors (see below), whose sum is σ = 54282240. Its totient is φ = 16585920.

The previous prime is 31965203. The next prime is 31965229. The reversal of 31965225 is 52256913.

It is not a de Polignac number, because 31965225 - 2¹⁰ = 31964201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31965229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2985 + ... + 8534.

It is an arithmetic number, because the mean of its divisors is an integer number (2261760).

Almost surely, 2^31965225 is an apocalyptic number.

It is an amenable number.

31965225 is a deficient number, since it is larger than the sum of its proper divisors (22317015).

31965225 is a wasteful number, since it uses less digits than its factorization.

31965225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11569 (or 11564 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

The square root of 31965225 is about 5653.7797091857. The cubic root of 31965225 is about 317.3651648104.

The spelling of 31965225 in words is "thirty-one million, nine hundred sixty-five thousand, two hundred twenty-five".