31197664 has 12 divisors (see below), whose sum is σ = 61420464. Its totient is φ = 15598816.

The previous prime is 31197659. The next prime is 31197689. The reversal of 31197664 is 46679113.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487432 + ... + 487495.

It is an arithmetic number, because the mean of its divisors is an integer number (5118372).

Almost surely, 2^31197664 is an apocalyptic number.

It is an amenable number.

31197664 is a deficient number, since it is larger than the sum of its proper divisors (30222800).

31197664 is an equidigital number, since it uses as much as digits as its factorization.

31197664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974937 (or 974929 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 31197664 is about 5585.4869080502. The cubic root of 31197664 is about 314.8043262791.

The spelling of 31197664 in words is "thirty-one million, one hundred ninety-seven thousand, six hundred sixty-four".