131604424 has 96 divisors (see below), whose sum is σ = 305303040. Its totient is φ = 52012800.

The previous prime is 131604409. The next prime is 131604437. The reversal of 131604424 is 424406131.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3060547 + ... + 3060589.

It is an arithmetic number, because the mean of its divisors is an integer number (3180240).

Almost surely, 2^131604424 is an apocalyptic number.

131604424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131604424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152651520).

131604424 is an abundant number, since it is smaller than the sum of its proper divisors (173698616).

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

131604424 is a wasteful number, since it uses less digits than its factorization.

131604424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 131604424 is about 11471.8971404036. The cubic root of 131604424 is about 508.6552088727.

The spelling of 131604424 in words is "one hundred thirty-one million, six hundred four thousand, four hundred twenty-four".