131320465 has 4 divisors (see below), whose sum is σ = 157584564. Its totient is φ = 105056368.

The previous prime is 131320451. The next prime is 131320477. The reversal of 131320465 is 564023131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30338064 + 100982401 = 5508^2 + 10049^2 .

It is a cyclic number.

It is not a de Polignac number, because 131320465 - 2⁷ = 131320337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13132042 + ... + 13132051.

It is an arithmetic number, because the mean of its divisors is an integer number (39396141).

Almost surely, 2^131320465 is an apocalyptic number.

It is an amenable number.

131320465 is a deficient number, since it is larger than the sum of its proper divisors (26264099).

131320465 is an equidigital number, since it uses as much as digits as its factorization.

131320465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26264098.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 131320465 is about 11459.5141694576. The cubic root of 131320465 is about 508.2891086373.

Adding to 131320465 its reverse (564023131), we get a palindrome (695343596).

The spelling of 131320465 in words is "one hundred thirty-one million, three hundred twenty thousand, four hundred sixty-five".