131505636 has 24 divisors (see below), whose sum is σ = 309887424. Its totient is φ = 43400800.

The previous prime is 131505623. The next prime is 131505641. The reversal of 131505636 is 636505131.

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 7 ways as a sum of consecutive naturals, for example, 53040 + ... + 55463.

It is an arithmetic number, because the mean of its divisors is an integer number (12911976).

Almost surely, 2^131505636 is an apocalyptic number.

It is an amenable number.

131505636 is an abundant number, since it is smaller than the sum of its proper divisors (178381788).

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

131505636 is a wasteful number, since it uses less digits than its factorization.

131505636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108611 (or 108609 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 131505636 is about 11467.5906798246. The cubic root of 131505636 is about 508.5279041121.

The spelling of 131505636 in words is "one hundred thirty-one million, five hundred five thousand, six hundred thirty-six".