31223143304 has 16 divisors (see below), whose sum is σ = 59080490700. Its totient is φ = 15468345792.

The previous prime is 31223143229. The next prime is 31223143319. The reversal of 31223143304 is 40334132213.

It can be written as a sum of positive squares in 2 ways, for example, as 30033583204 + 1189560100 = 173302^2 + 34490^2 .

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, 17902307 + ... + 17904050.

Almost surely, 2^31223143304 is an apocalyptic number.

It is an amenable number.

31223143304 is a deficient number, since it is larger than the sum of its proper divisors (27857347396).

31223143304 is a wasteful number, since it uses less digits than its factorization.

31223143304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35806472 (or 35806468 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 31223143304 its reverse (40334132213), we get a palindrome (71557275517).

The spelling of 31223143304 in words is "thirty-one billion, two hundred twenty-three million, one hundred forty-three thousand, three hundred four".