131504031 has 24 divisors (see below), whose sum is σ = 196928160. Its totient is φ = 84494016.

The previous prime is 131504029. The next prime is 131504053. The reversal of 131504031 is 130405131.

131504031 is a `hidden beast` number, since 131 + 504 + 0 + 31 = 666.

It is not a de Polignac number, because 131504031 - 2¹ = 131504029 is a prime.

It is a super-2 number, since 2×131504031² = 34586620338497922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131503995 and 131504013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131504011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34486 + ... + 38108.

It is an arithmetic number, because the mean of its divisors is an integer number (8205340).

Almost surely, 2^131504031 is an apocalyptic number.

131504031 is a deficient number, since it is larger than the sum of its proper divisors (65424129).

131504031 is a wasteful number, since it uses less digits than its factorization.

131504031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3775 (or 3772 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 131504031 is about 11467.5206997851. The cubic root of 131504031 is about 508.5258352766.

Adding to 131504031 its reverse (130405131), we get a palindrome (261909162).

The spelling of 131504031 in words is "one hundred thirty-one million, five hundred four thousand, thirty-one".