131520131 has 4 divisors (see below), whose sum is σ = 131661432. Its totient is φ = 131378832.

The previous prime is 131520127. The next prime is 131520149. The reversal of 131520131 is 131025131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131025131 = 3659 ⋅35809.

It is a cyclic number.

It is not a de Polignac number, because 131520131 - 2² = 131520127 is a prime.

It is a super-2 number, since 2×131520131² = 34595089716514322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131520121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69245 + ... + 71118.

It is an arithmetic number, because the mean of its divisors is an integer number (32915358).

Almost surely, 2^131520131 is an apocalyptic number.

131520131 is a deficient number, since it is larger than the sum of its proper divisors (141301).

131520131 is an equidigital number, since it uses as much as digits as its factorization.

131520131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141300.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 131520131 is about 11468.2226609009. Note that the first 3 decimals coincide. The cubic root of 131520131 is about 508.5465873194.

Adding to 131520131 its reverse (131025131), we get a palindrome (262545262).

The spelling of 131520131 in words is "one hundred thirty-one million, five hundred twenty thousand, one hundred thirty-one".