131142531 has 16 divisors (see below), whose sum is σ = 188894720. Its totient is φ = 80451360.

The previous prime is 131142523. The next prime is 131142533. The reversal of 131142531 is 135241131.

It is not a de Polignac number, because 131142531 - 2³ = 131142523 is a prime.

It is a super-2 number, since 2×131142531² = 34396726874171922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131142498 and 131142507.

It is not an unprimeable number, because it can be changed into a prime (131142533) by changing a digit.

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, 7830 + ... + 17988.

It is an arithmetic number, because the mean of its divisors is an integer number (11805920).

Almost surely, 2^131142531 is an apocalyptic number.

131142531 is a deficient number, since it is larger than the sum of its proper divisors (57752189).

131142531 is a wasteful number, since it uses less digits than its factorization.

131142531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10506.

The product of its digits is 360, while the sum is 21.

The square root of 131142531 is about 11451.7479451829. The cubic root of 131142531 is about 508.0594343733.

Adding to 131142531 its reverse (135241131), we get a palindrome (266383662).

The spelling of 131142531 in words is "one hundred thirty-one million, one hundred forty-two thousand, five hundred thirty-one".