31143004 has 12 divisors (see below), whose sum is σ = 54539800. Its totient is φ = 15560208.

The previous prime is 31142987. The next prime is 31143017. The reversal of 31143004 is 40034113.

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, 7927 + ... + 11185.

Almost surely, 2^31143004 is an apocalyptic number.

It is an amenable number.

31143004 is a deficient number, since it is larger than the sum of its proper divisors (23396796).

31143004 is a wasteful number, since it uses less digits than its factorization.

31143004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5652 (or 5650 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31143004 is about 5580.5917248980. The cubic root of 31143004 is about 314.6203673820.

Adding to 31143004 its reverse (40034113), we get a palindrome (71177117).

The spelling of 31143004 in words is "thirty-one million, one hundred forty-three thousand, four".