131558887 has 4 divisors (see below), whose sum is σ = 134618440. Its totient is φ = 128499336.

The previous prime is 131558881. The next prime is 131558891. The reversal of 131558887 is 788855131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788855131 = 17 ⋅46403243.

It is a cyclic number.

It is not a de Polignac number, because 131558887 - 2¹⁵ = 131526119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131558881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1529712 + ... + 1529797.

It is an arithmetic number, because the mean of its divisors is an integer number (33654610).

Almost surely, 2^131558887 is an apocalyptic number.

131558887 is a deficient number, since it is larger than the sum of its proper divisors (3059553).

131558887 is an equidigital number, since it uses as much as digits as its factorization.

131558887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059552.

The product of its digits is 268800, while the sum is 46.

The square root of 131558887 is about 11469.9122490105. The cubic root of 131558887 is about 508.5965347957.

The spelling of 131558887 in words is "one hundred thirty-one million, five hundred fifty-eight thousand, eight hundred eighty-seven".