131515453 has 4 divisors (see below), whose sum is σ = 131538748. Its totient is φ = 131492160.

The previous prime is 131515441. The next prime is 131515459. The reversal of 131515453 is 354515131.

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 128210329 + 3305124 = 11323^2 + 1818^2 .

It is a cyclic number.

It is not a de Polignac number, because 131515453 - 2⁵ = 131515421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131515459) 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, 2773 + ... + 16453.

It is an arithmetic number, because the mean of its divisors is an integer number (32884687).

Almost surely, 2^131515453 is an apocalyptic number.

It is an amenable number.

131515453 is a deficient number, since it is larger than the sum of its proper divisors (23295).

131515453 is an equidigital number, since it uses as much as digits as its factorization.

131515453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23294.

The product of its digits is 4500, while the sum is 28.

The square root of 131515453 is about 11468.0187042052. The cubic root of 131515453 is about 508.5405578010.

The spelling of 131515453 in words is "one hundred thirty-one million, five hundred fifteen thousand, four hundred fifty-three".