131171631 has 8 divisors (see below), whose sum is σ = 175248000. Its totient is φ = 87271512.

The previous prime is 131171603. The next prime is 131171647. The reversal of 131171631 is 136171131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131171631 - 2⁷ = 131171503 is a prime.

It is a super-2 number, since 2×131171631² = 34411993558400322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131171431) 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, 42315 + ... + 45308.

It is an arithmetic number, because the mean of its divisors is an integer number (21906000).

Almost surely, 2^131171631 is an apocalyptic number.

131171631 is a deficient number, since it is larger than the sum of its proper divisors (44076369).

131171631 is an equidigital number, since it uses as much as digits as its factorization.

131171631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88125.

The product of its digits is 378, while the sum is 24.

The square root of 131171631 is about 11453.0184231058. The cubic root of 131171631 is about 508.0970103756.

The spelling of 131171631 in words is "one hundred thirty-one million, one hundred seventy-one thousand, six hundred thirty-one".