131885585 has 16 divisors (see below), whose sum is σ = 171336144. Its totient is φ = 96878592.

The previous prime is 131885581. The next prime is 131885587. The reversal of 131885585 is 585588131.

It can be written as a sum of positive squares in 8 ways, for example, as 66210769 + 65674816 = 8137^2 + 8104^2 .

It is a cyclic number.

It is not a de Polignac number, because 131885585 - 2² = 131885581 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131885581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7289 + ... + 17801.

It is an arithmetic number, because the mean of its divisors is an integer number (10708509).

Almost surely, 2^131885585 is an apocalyptic number.

It is an amenable number.

131885585 is a deficient number, since it is larger than the sum of its proper divisors (39450559).

131885585 is a wasteful number, since it uses less digits than its factorization.

131885585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10724.

The product of its digits is 192000, while the sum is 44.

The square root of 131885585 is about 11484.1449398725. The cubic root of 131885585 is about 509.0171832350.

The spelling of 131885585 in words is "one hundred thirty-one million, eight hundred eighty-five thousand, five hundred eighty-five".