131313504 has 48 divisors (see below), whose sum is σ = 393942528. Its totient is φ = 37517952.

The previous prime is 131313493. The next prime is 131313521. The reversal of 131313504 is 405313131.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97032 + ... + 98375.

It is an arithmetic number, because the mean of its divisors is an integer number (8207136).

Almost surely, 2^131313504 is an apocalyptic number.

131313504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

131313504 is an abundant number, since it is smaller than the sum of its proper divisors (262629024).

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

131313504 is a wasteful number, since it uses less digits than its factorization.

131313504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195427 (or 195419 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 131313504 is about 11459.2104440053. The cubic root of 131313504 is about 508.2801273943.

Adding to 131313504 its reverse (405313131), we get a palindrome (536626635).

The spelling of 131313504 in words is "one hundred thirty-one million, three hundred thirteen thousand, five hundred four".