31140664 has 16 divisors (see below), whose sum is σ = 60402600. Its totient is φ = 15033312.

The previous prime is 31140631. The next prime is 31140673. The reversal of 31140664 is 46604113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66882 + ... + 67345.

Almost surely, 2^31140664 is an apocalyptic number.

It is an amenable number.

31140664 is a deficient number, since it is larger than the sum of its proper divisors (29261936).

31140664 is a wasteful number, since it uses less digits than its factorization.

31140664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134262 (or 134258 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 31140664 is about 5580.3820657729. The cubic root of 31140664 is about 314.6124872805.

Adding to 31140664 its reverse (46604113), we get a palindrome (77744777).

The spelling of 31140664 in words is "thirty-one million, one hundred forty thousand, six hundred sixty-four".