13231313220 has 96 divisors (see below), whose sum is σ = 39361190400. Its totient is φ = 3314594304.

The previous prime is 13231313219. The next prime is 13231313239. The reversal of 13231313220 is 2231313231.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38380 + ... + 167139.

It is an arithmetic number, because the mean of its divisors is an integer number (410012400).

Almost surely, 2^13231313220 is an apocalyptic number.

13231313220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13231313220 is an abundant number, since it is smaller than the sum of its proper divisors (26129877180).

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

13231313220 is a wasteful number, since it uses less digits than its factorization.

13231313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205597 (or 205595 counting only the distinct ones).

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

Adding to 13231313220 its reverse (2231313231), we get a palindrome (15462626451).

The spelling of 13231313220 in words is "thirteen billion, two hundred thirty-one million, three hundred thirteen thousand, two hundred twenty".