131312433 has 16 divisors (see below), whose sum is σ = 201968640. Its totient is φ = 74333136.

The previous prime is 131312417. The next prime is 131312449. The reversal of 131312433 is 334213131.

It is an interprime number because it is at equal distance from previous prime (131312417) and next prime (131312449).

It is not a de Polignac number, because 131312433 - 2⁴ = 131312417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (131312413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26973 + ... + 31466.

It is an arithmetic number, because the mean of its divisors is an integer number (12623040).

Almost surely, 2^131312433 is an apocalyptic number.

It is an amenable number.

131312433 is a deficient number, since it is larger than the sum of its proper divisors (70656207).

131312433 is a wasteful number, since it uses less digits than its factorization.

131312433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58556.

The product of its digits is 648, while the sum is 21.

The square root of 131312433 is about 11459.1637129417. The cubic root of 131312433 is about 508.2787455372.

Adding to 131312433 its reverse (334213131), we get a palindrome (465525564).

The spelling of 131312433 in words is "one hundred thirty-one million, three hundred twelve thousand, four hundred thirty-three".