31243204 has 6 divisors (see below), whose sum is σ = 54675614. Its totient is φ = 15621600.

The previous prime is 31243193. The next prime is 31243211. The reversal of 31243204 is 40234213.

It can be written as a sum of positive squares in only one way, i.e., 29680704 + 1562500 = 5448^2 + 1250^2 .

It is a super-2 number, since 2×31243204² = 1952275592371232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3905397 + ... + 3905404.

Almost surely, 2^31243204 is an apocalyptic number.

It is an amenable number.

31243204 is a deficient number, since it is larger than the sum of its proper divisors (23432410).

31243204 is a wasteful number, since it uses less digits than its factorization.

31243204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7810805 (or 7810803 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 31243204 is about 5589.5620579791. The cubic root of 31243204 is about 314.9574276891.

Adding to 31243204 its reverse (40234213), we get a palindrome (71477417).

It can be divided in two parts, 3124 and 3204, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 31243204 in words is "thirty-one million, two hundred forty-three thousand, two hundred four".