131544233 has 4 divisors (see below), whose sum is σ = 131577168. Its totient is φ = 131511300.

The previous prime is 131544229. The next prime is 131544247. The reversal of 131544233 is 332445131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 332445131 = 6761 ⋅49171.

It is a cyclic number.

It is not a de Polignac number, because 131544233 - 2² = 131544229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131544223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9491 + ... + 18792.

It is an arithmetic number, because the mean of its divisors is an integer number (32894292).

Almost surely, 2^131544233 is an apocalyptic number.

It is an amenable number.

131544233 is a deficient number, since it is larger than the sum of its proper divisors (32935).

131544233 is an equidigital number, since it uses as much as digits as its factorization.

131544233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32934.

The product of its digits is 4320, while the sum is 26.

The square root of 131544233 is about 11469.2734294723. The cubic root of 131544233 is about 508.5776503491.

Adding to 131544233 its reverse (332445131), we get a palindrome (463989364).

The spelling of 131544233 in words is "one hundred thirty-one million, five hundred forty-four thousand, two hundred thirty-three".