131322320 has 40 divisors (see below), whose sum is σ = 306376224. Its totient is φ = 52348032.

The previous prime is 131322313. The next prime is 131322349. The reversal of 131322320 is 23223131.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 21887 + ... + 27233.

Almost surely, 2^131322320 is an apocalyptic number.

131322320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131322320 is an abundant number, since it is smaller than the sum of its proper divisors (175053904).

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

131322320 is a wasteful number, since it uses less digits than its factorization.

131322320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5667 (or 5661 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 131322320 is about 11459.5951062854. The cubic root of 131322320 is about 508.2915019476.

Adding to 131322320 its reverse (23223131), we get a palindrome (154545451).

The spelling of 131322320 in words is "one hundred thirty-one million, three hundred twenty-two thousand, three hundred twenty".