131313320 has 16 divisors (see below), whose sum is σ = 295455060. Its totient is φ = 52525312.

The previous prime is 131313319. The next prime is 131313323. The reversal of 131313320 is 23313131.

It can be written as a sum of positive squares in 2 ways, for example, as 131285764 + 27556 = 11458^2 + 166^2 .

It is not an unprimeable number, because it can be changed into a prime (131313323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641377 + ... + 1641456.

Almost surely, 2^131313320 is an apocalyptic number.

131313320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131313320 is an abundant number, since it is smaller than the sum of its proper divisors (164141740).

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

131313320 is a wasteful number, since it uses less digits than its factorization.

131313320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3282844 (or 3282840 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 131313320 is about 11459.2024155261. The cubic root of 131313320 is about 508.2798899890.

Adding to 131313320 its reverse (23313131), we get a palindrome (154626451).

The spelling of 131313320 in words is "one hundred thirty-one million, three hundred thirteen thousand, three hundred twenty".