131322231 has 12 divisors (see below), whose sum is σ = 195807040. Its totient is φ = 84723840.

The previous prime is 131322227. The next prime is 131322251. The reversal of 131322231 is 132223131.

It is not a de Polignac number, because 131322231 - 2² = 131322227 is a prime.

It is a super-2 number, since 2×131322231² = 34491056709634722, 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 (131322251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235066 + ... + 235623.

Almost surely, 2^131322231 is an apocalyptic number.

131322231 is a deficient number, since it is larger than the sum of its proper divisors (64484809).

131322231 is a wasteful number, since it uses less digits than its factorization.

131322231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470726 (or 470723 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 131322231 is about 11459.5912230760. The cubic root of 131322231 is about 508.2913871208.

Adding to 131322231 its reverse (132223131), we get a palindrome (263545362).

The spelling of 131322231 in words is "one hundred thirty-one million, three hundred twenty-two thousand, two hundred thirty-one".