31233201320 has 32 divisors (see below), whose sum is σ = 70293159720. Its totient is φ = 12489999360.

The previous prime is 31233201301. The next prime is 31233201379. The reversal of 31233201320 is 2310233213.

It can be written as a sum of positive squares in 4 ways, for example, as 18644810116 + 12588391204 = 136546^2 + 112198^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31233201292 and 31233201301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54644 + ... + 255836.

Almost surely, 2^31233201320 is an apocalyptic number.

It is an amenable number.

31233201320 is an abundant number, since it is smaller than the sum of its proper divisors (39059958400).

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

31233201320 is a wasteful number, since it uses less digits than its factorization.

31233201320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205085 (or 205081 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31233201320 its reverse (2310233213), we get a palindrome (33543434533).

The spelling of 31233201320 in words is "thirty-one billion, two hundred thirty-three million, two hundred one thousand, three hundred twenty".