131142520 has 32 divisors (see below), whose sum is σ = 295470000. Its totient is φ = 52386048.

The previous prime is 131142491. The next prime is 131142521. The reversal of 131142520 is 25241131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131142521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35731 + ... + 39229.

Almost surely, 2^131142520 is an apocalyptic number.

131142520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131142520 is an abundant number, since it is smaller than the sum of its proper divisors (164327480).

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

131142520 is a wasteful number, since it uses less digits than its factorization.

131142520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4447 (or 4443 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 131142520 is about 11451.7474649068. The cubic root of 131142520 is about 508.0594201683.

Adding to 131142520 its reverse (25241131), we get a palindrome (156383651).

The spelling of 131142520 in words is "one hundred thirty-one million, one hundred forty-two thousand, five hundred twenty".