31223132304 has 80 divisors (see below), whose sum is σ = 99273562752. Its totient is φ = 8234671104.

The previous prime is 31223132299. The next prime is 31223132309. The reversal of 31223132304 is 40323132213.

It is an interprime number because it is at equal distance from previous prime (31223132299) and next prime (31223132309).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (31223132309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3569709 + ... + 3578444.

Almost surely, 2^31223132304 is an apocalyptic number.

It is an amenable number.

31223132304 is an abundant number, since it is smaller than the sum of its proper divisors (68050430448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31223132304 is a wasteful number, since it uses less digits than its factorization.

31223132304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7148184 (or 7148178 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31223132304 its reverse (40323132213), we get a palindrome (71546264517).

Subtracting 31223132304 from its reverse (40323132213), we obtain a palindrome (9099999909).

The spelling of 31223132304 in words is "thirty-one billion, two hundred twenty-three million, one hundred thirty-two thousand, three hundred four".