131240304 has 80 divisors (see below), whose sum is σ = 405703200. Its totient is φ = 40379904.

The previous prime is 131240299. The next prime is 131240371. The reversal of 131240304 is 403042131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6069 + ... + 17300.

It is an arithmetic number, because the mean of its divisors is an integer number (5071290).

Almost surely, 2^131240304 is an apocalyptic number.

It is an amenable number.

131240304 is an abundant number, since it is smaller than the sum of its proper divisors (274462896).

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

131240304 is a wasteful number, since it uses less digits than its factorization.

131240304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23399 (or 23387 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 131240304 is about 11456.0160614413. The cubic root of 131240304 is about 508.1856638401.

Adding to 131240304 its reverse (403042131), we get a palindrome (534282435).

It can be divided in two parts, 1312 and 40304, that added together give a triangular number (41616 = T₂₈₈).

The spelling of 131240304 in words is "one hundred thirty-one million, two hundred forty thousand, three hundred four".