131587236 has 72 divisors (see below), whose sum is σ = 381981600. Its totient is φ = 37774080.

The previous prime is 131587231. The next prime is 131587237. The reversal of 131587236 is 632785131.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 131587236.

It is not an unprimeable number, because it can be changed into a prime (131587231) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1221 + ... + 16268.

It is an arithmetic number, because the mean of its divisors is an integer number (5305300).

Almost surely, 2^131587236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131587236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190990800).

131587236 is an abundant number, since it is smaller than the sum of its proper divisors (250394364).

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

131587236 is a wasteful number, since it uses less digits than its factorization.

131587236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17529 (or 17524 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 131587236 is about 11471.1479809128. The cubic root of 131587236 is about 508.6330638563.

The spelling of 131587236 in words is "one hundred thirty-one million, five hundred eighty-seven thousand, two hundred thirty-six".