131637506 has 64 divisors (see below), whose sum is σ = 270950400. Its totient is φ = 46301760.

The previous prime is 131637449. The next prime is 131637521. The reversal of 131637506 is 605736131.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 93395 + ... + 94793.

It is an arithmetic number, because the mean of its divisors is an integer number (4233600).

Almost surely, 2^131637506 is an apocalyptic number.

131637506 is an abundant number, since it is smaller than the sum of its proper divisors (139312894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131637506 is a wasteful number, since it uses less digits than its factorization.

131637506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 131637506 is about 11473.3389211685. The cubic root of 131637506 is about 508.6978262896.

The spelling of 131637506 in words is "one hundred thirty-one million, six hundred thirty-seven thousand, five hundred six".