31144664 has 16 divisors (see below), whose sum is σ = 58456320. Its totient is φ = 15556320.

The previous prime is 31144661. The next prime is 31144681. The reversal of 31144664 is 46644113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12134 + ... + 14474.

It is an arithmetic number, because the mean of its divisors is an integer number (3653520).

Almost surely, 2^31144664 is an apocalyptic number.

It is an amenable number.

31144664 is a deficient number, since it is larger than the sum of its proper divisors (27311656).

31144664 is a wasteful number, since it uses less digits than its factorization.

31144664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010 (or 4006 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 31144664 is about 5580.7404526640. The cubic root of 31144664 is about 314.6259573002.

Adding to 31144664 its reverse (46644113), we get a palindrome (77788777).

The spelling of 31144664 in words is "thirty-one million, one hundred forty-four thousand, six hundred sixty-four".