131133231 has 12 divisors (see below), whose sum is σ = 199384120. Its totient is φ = 82820880.

The previous prime is 131133221. The next prime is 131133241. The reversal of 131133231 is 132331131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131133221) and next prime (131133241).

It is not a de Polignac number, because 131133231 - 2⁵ = 131133199 is a prime.

It is a super-2 number, since 2×131133231² = 34391848544998722, 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 (131133221) 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, 383260 + ... + 383601.

Almost surely, 2^131133231 is an apocalyptic number.

131133231 is a deficient number, since it is larger than the sum of its proper divisors (68250889).

131133231 is a wasteful number, since it uses less digits than its factorization.

131133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766886 (or 766883 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 131133231 is about 11451.3418864341. The cubic root of 131133231 is about 508.0474243757.

Adding to 131133231 its reverse (132331131), we get a palindrome (263464362).

The spelling of 131133231 in words is "one hundred thirty-one million, one hundred thirty-three thousand, two hundred thirty-one".