31143604 has 12 divisors (see below), whose sum is σ = 54609184. Its totient is φ = 15540984.

The previous prime is 31143601. The next prime is 31143613. The reversal of 31143604 is 40634113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143601) 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, 5352 + ... + 9535.

Almost surely, 2^31143604 is an apocalyptic number.

It is an amenable number.

31143604 is a deficient number, since it is larger than the sum of its proper divisors (23465580).

31143604 is a wasteful number, since it uses less digits than its factorization.

31143604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15414 (or 15412 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 31143604 is about 5580.6454823793. The cubic root of 31143604 is about 314.6223878573.

Adding to 31143604 its reverse (40634113), we get a palindrome (71777717).

The spelling of 31143604 in words is "thirty-one million, one hundred forty-three thousand, six hundred four".