131537465 has 4 divisors (see below), whose sum is σ = 157844964. Its totient is φ = 105229968.

The previous prime is 131537453. The next prime is 131537501. The reversal of 131537465 is 564735131.

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 97990201 + 33547264 = 9899^2 + 5792^2 .

It is a cyclic number.

It is not a de Polignac number, because 131537465 - 2¹⁶ = 131471929 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, 13153742 + ... + 13153751.

It is an arithmetic number, because the mean of its divisors is an integer number (39461241).

Almost surely, 2^131537465 is an apocalyptic number.

It is an amenable number.

131537465 is a deficient number, since it is larger than the sum of its proper divisors (26307499).

131537465 is an equidigital number, since it uses as much as digits as its factorization.

131537465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26307498.

The product of its digits is 37800, while the sum is 35.

The square root of 131537465 is about 11468.9783764728. The cubic root of 131537465 is about 508.5689280293.

The spelling of 131537465 in words is "one hundred thirty-one million, five hundred thirty-seven thousand, four hundred sixty-five".