31223311320 has 32 divisors (see below), whose sum is σ = 93669934320. Its totient is φ = 8326216320.

The previous prime is 31223311319. The next prime is 31223311333. The reversal of 31223311320 is 2311332213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130097011 + ... + 130097250.

Almost surely, 2^31223311320 is an apocalyptic number.

31223311320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31223311320 is an abundant number, since it is smaller than the sum of its proper divisors (62446623000).

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

31223311320 is a wasteful number, since it uses less digits than its factorization.

31223311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260194275 (or 260194271 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31223311320 its reverse (2311332213), we get a palindrome (33534643533).

The spelling of 31223311320 in words is "thirty-one billion, two hundred twenty-three million, three hundred eleven thousand, three hundred twenty".