131532331 has 8 divisors (see below), whose sum is σ = 156858624. Its totient is φ = 107840040.

The previous prime is 131532311. The next prime is 131532337. The reversal of 131532331 is 133235131.

It is a happy number.

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

It is not a de Polignac number, because 131532331 - 2⁹ = 131531819 is a prime.

It is a super-2 number, since 2×131532331² = 34601508196587122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131532337) 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, 408325 + ... + 408646.

It is an arithmetic number, because the mean of its divisors is an integer number (19607328).

Almost surely, 2^131532331 is an apocalyptic number.

131532331 is a deficient number, since it is larger than the sum of its proper divisors (25326293).

131532331 is an equidigital number, since it uses as much as digits as its factorization.

131532331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817001.

The product of its digits is 810, while the sum is 22.

The square root of 131532331 is about 11468.7545531326. The cubic root of 131532331 is about 508.5623113420.

Adding to 131532331 its reverse (133235131), we get a palindrome (264767462).

The spelling of 131532331 in words is "one hundred thirty-one million, five hundred thirty-two thousand, three hundred thirty-one".