131555589 has 16 divisors (see below), whose sum is σ = 194493504. Its totient is φ = 78422400.

The previous prime is 131555549. The next prime is 131555597. The reversal of 131555589 is 985555131.

It is not a de Polignac number, because 131555589 - 2⁹ = 131555077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131555589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131555509) 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, 30664 + ... + 34689.

It is an arithmetic number, because the mean of its divisors is an integer number (12155844).

Almost surely, 2^131555589 is an apocalyptic number.

It is an amenable number.

131555589 is a deficient number, since it is larger than the sum of its proper divisors (62937915).

131555589 is a wasteful number, since it uses less digits than its factorization.

131555589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65428.

The product of its digits is 135000, while the sum is 42.

The square root of 131555589 is about 11469.7684806625. The cubic root of 131555589 is about 508.5922848221.

The spelling of 131555589 in words is "one hundred thirty-one million, five hundred fifty-five thousand, five hundred eighty-nine".