131312533 has 4 divisors (see below), whose sum is σ = 143250048. Its totient is φ = 119375020.

The previous prime is 131312527. The next prime is 131312567. The reversal of 131312533 is 335213131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131312533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131312033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5968741 + ... + 5968762.

It is an arithmetic number, because the mean of its divisors is an integer number (35812512).

Almost surely, 2^131312533 is an apocalyptic number.

It is an amenable number.

131312533 is a deficient number, since it is larger than the sum of its proper divisors (11937515).

131312533 is a wasteful number, since it uses less digits than its factorization.

131312533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11937514.

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

The square root of 131312533 is about 11459.1680762610. The cubic root of 131312533 is about 508.2788745625.

Adding to 131312533 its reverse (335213131), we get a palindrome (466525664).

The spelling of 131312533 in words is "one hundred thirty-one million, three hundred twelve thousand, five hundred thirty-three".