131604517 has 16 divisors (see below), whose sum is σ = 149151744. Its totient is φ = 115038000.

The previous prime is 131604491. The next prime is 131604541. The reversal of 131604517 is 715406131.

It is not a de Polignac number, because 131604517 - 2²³ = 123215909 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 (131604587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55792 + ... + 58102.

It is an arithmetic number, because the mean of its divisors is an integer number (9321984).

Almost surely, 2^131604517 is an apocalyptic number.

It is an amenable number.

131604517 is a deficient number, since it is larger than the sum of its proper divisors (17547227).

131604517 is a wasteful number, since it uses less digits than its factorization.

131604517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 131604517 is about 11471.9011937865. The cubic root of 131604517 is about 508.6553286886.

The spelling of 131604517 in words is "one hundred thirty-one million, six hundred four thousand, five hundred seventeen".