131890231 has 12 divisors (see below), whose sum is σ = 149073480. Its totient is φ = 115585680.

The previous prime is 131890223. The next prime is 131890247. The reversal of 131890231 is 132098131.

It is not a de Polignac number, because 131890231 - 2³ = 131890223 is a prime.

It is a super-2 number, since 2×131890231² = 34790066066466722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131890231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131890261) 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, 204796 + ... + 205438.

It is an arithmetic number, because the mean of its divisors is an integer number (12422790).

Almost surely, 2^131890231 is an apocalyptic number.

131890231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131890231 is a deficient number, since it is larger than the sum of its proper divisors (17183249).

131890231 is an frugal number, since it uses more digits than its factorization.

131890231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 131890231 is about 11484.3472169732. The cubic root of 131890231 is about 509.0231602998.

The spelling of 131890231 in words is "one hundred thirty-one million, eight hundred ninety thousand, two hundred thirty-one".