131213320 has 32 divisors (see below), whose sum is σ = 337406400. Its totient is φ = 44987328.

The previous prime is 131213317. The next prime is 131213333. The reversal of 131213320 is 23312131.

131213320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 131213294 and 131213303.

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, 234030 + ... + 234589.

It is an arithmetic number, because the mean of its divisors is an integer number (10543950).

Almost surely, 2^131213320 is an apocalyptic number.

131213320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131213320 is an abundant number, since it is smaller than the sum of its proper divisors (206193080).

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

131213320 is a wasteful number, since it uses less digits than its factorization.

131213320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468637 (or 468633 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 131213320 is about 11454.8382790854. The cubic root of 131213320 is about 508.1508325130.

Adding to 131213320 its reverse (23312131), we get a palindrome (154525451).

The spelling of 131213320 in words is "one hundred thirty-one million, two hundred thirteen thousand, three hundred twenty".