1232312131 has 2 divisors, whose sum is σ = 1232312132. Its totient is φ = 1232312130.

The previous prime is 1232312117. The next prime is 1232312143. The reversal of 1232312131 is 1312132321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232312131 is a prime.

It is a super-2 number, since 2×1232312131² = 3037186376419522322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1232312099 and 1232312108.

It is not a weakly prime, because it can be changed into another prime (1232312831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616156065 + 616156066.

It is an arithmetic number, because the mean of its divisors is an integer number (616156066).

Almost surely, 2^1232312131 is an apocalyptic number.

1232312131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232312131 is an equidigital number, since it uses as much as digits as its factorization.

1232312131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 1232312131 is about 35104.3035965678. The cubic root of 1232312131 is about 1072.1122078818.

Adding to 1232312131 its reverse (1312132321), we get a palindrome (2544444452).

The spelling of 1232312131 in words is "one billion, two hundred thirty-two million, three hundred twelve thousand, one hundred thirty-one".