131566564 has 48 divisors (see below), whose sum is σ = 250387200. Its totient is φ = 60293376.

The previous prime is 131566559. The next prime is 131566571. The reversal of 131566564 is 465665131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358309 + ... + 358675.

It is an arithmetic number, because the mean of its divisors is an integer number (5216400).

Almost surely, 2^131566564 is an apocalyptic number.

It is an amenable number.

131566564 is a deficient number, since it is larger than the sum of its proper divisors (118820636).

131566564 is a wasteful number, since it uses less digits than its factorization.

131566564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 530 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 131566564 is about 11470.2469023121. The cubic root of 131566564 is about 508.6064275004.

The spelling of 131566564 in words is "one hundred thirty-one million, five hundred sixty-six thousand, five hundred sixty-four".