31668325 has 12 divisors (see below), whose sum is σ = 42289828. Its totient is φ = 23385600.

The previous prime is 31668281. The next prime is 31668347. The reversal of 31668325 is 52386613.

It can be written as a sum of positive squares in 6 ways, for example, as 5022081 + 26646244 = 2241^2 + 5162^2 .

It is not a de Polignac number, because 31668325 - 2²¹ = 29571173 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 48396 + ... + 49045.

Almost surely, 2^31668325 is an apocalyptic number.

It is an amenable number.

31668325 is a deficient number, since it is larger than the sum of its proper divisors (10621503).

31668325 is a wasteful number, since it uses less digits than its factorization.

31668325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97464 (or 97459 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 31668325 is about 5627.4616835657. The cubic root of 31668325 is about 316.3795211735.

The spelling of 31668325 in words is "thirty-one million, six hundred sixty-eight thousand, three hundred twenty-five".