1232331131 has 4 divisors (see below), whose sum is σ = 1232601192. Its totient is φ = 1232061072.

The previous prime is 1232331103. The next prime is 1232331161. The reversal of 1232331131 is 1311332321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232331131 is a prime.

It is a super-2 number, since 2×1232331131² = 3037280032863478322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232331161) 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, 128066 + ... + 137351.

It is an arithmetic number, because the mean of its divisors is an integer number (308150298).

Almost surely, 2^1232331131 is an apocalyptic number.

1232331131 is a deficient number, since it is larger than the sum of its proper divisors (270061).

1232331131 is an equidigital number, since it uses as much as digits as its factorization.

1232331131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270060.

The product of its digits is 324, while the sum is 20.

The square root of 1232331131 is about 35104.5742176144. The cubic root of 1232331131 is about 1072.1177178568.

Adding to 1232331131 its reverse (1311332321), we get a palindrome (2543663452).

The spelling of 1232331131 in words is "one billion, two hundred thirty-two million, three hundred thirty-one thousand, one hundred thirty-one".