131757233 has 4 divisors (see below), whose sum is σ = 131834148. Its totient is φ = 131680320.

The previous prime is 131757221. The next prime is 131757239. The reversal of 131757233 is 332757131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19651489 + 112105744 = 4433^2 + 10588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131757233 is a prime.

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 131757233.

It is not an unprimeable number, because it can be changed into a prime (131757239) 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, 35828 + ... + 39333.

It is an arithmetic number, because the mean of its divisors is an integer number (32958537).

Almost surely, 2^131757233 is an apocalyptic number.

It is an amenable number.

131757233 is a deficient number, since it is larger than the sum of its proper divisors (76915).

131757233 is an equidigital number, since it uses as much as digits as its factorization.

131757233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76914.

The product of its digits is 13230, while the sum is 32.

The square root of 131757233 is about 11478.5553533535. Note that the first 3 decimals coincide. The cubic root of 131757233 is about 508.8520032439.

The spelling of 131757233 in words is "one hundred thirty-one million, seven hundred fifty-seven thousand, two hundred thirty-three".