31965970 has 16 divisors (see below), whose sum is σ = 58328280. Its totient is φ = 12610944.

The previous prime is 31965959. The next prime is 31966061. The reversal of 31965970 is 7956913.

It can be written as a sum of positive squares in 4 ways, for example, as 30173049 + 1792921 = 5493^2 + 1339^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21165 + ... + 22624.

Almost surely, 2^31965970 is an apocalyptic number.

31965970 is a deficient number, since it is larger than the sum of its proper divisors (26362310).

31965970 is a wasteful number, since it uses less digits than its factorization.

31965970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43869.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 31965970 is about 5653.8455939299. The cubic root of 31965970 is about 317.3676303565.

The spelling of 31965970 in words is "thirty-one million, nine hundred sixty-five thousand, nine hundred seventy".