131660031 has 4 divisors (see below), whose sum is σ = 175546712. Its totient is φ = 87773352.

The previous prime is 131660017. The next prime is 131660033. The reversal of 131660031 is 130066131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 131660031 - 2⁵ = 131659999 is a prime.

It is a super-2 number, since 2×131660031² = 34668727525841922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131660033) 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, 21943336 + ... + 21943341.

It is an arithmetic number, because the mean of its divisors is an integer number (43886678).

Almost surely, 2^131660031 is an apocalyptic number.

131660031 is a deficient number, since it is larger than the sum of its proper divisors (43886681).

131660031 is an equidigital number, since it uses as much as digits as its factorization.

131660031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43886680.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 131660031 is about 11474.3205027575. The cubic root of 131660031 is about 508.7268397154.

The spelling of 131660031 in words is "one hundred thirty-one million, six hundred sixty thousand, thirty-one".