1313912231 has 2 divisors, whose sum is σ = 1313912232. Its totient is φ = 1313912230.

The previous prime is 1313912227. The next prime is 1313912233. The reversal of 1313912231 is 1322193131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1313912231 - 2² = 1313912227 is a prime.

It is a super-2 number, since 2×1313912231² = 3452730701542794722, which contains 22 as substring.

Together with 1313912233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1313912231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313912233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656956115 + 656956116.

It is an arithmetic number, because the mean of its divisors is an integer number (656956116).

Almost surely, 2^1313912231 is an apocalyptic number.

1313912231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313912231 is an equidigital number, since it uses as much as digits as its factorization.

1313912231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 26.

The square root of 1313912231 is about 36247.9272648796. The cubic root of 1313912231 is about 1095.2723358123.

The spelling of 1313912231 in words is "one billion, three hundred thirteen million, nine hundred twelve thousand, two hundred thirty-one".