231334213391 has 2 divisors, whose sum is σ = 231334213392. Its totient is φ = 231334213390.

The previous prime is 231334213343. The next prime is 231334213393. The reversal of 231334213391 is 193312433132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231334213391 - 2²² = 231330019087 is a prime.

It is a Sophie Germain prime.

Together with 231334213393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231334213393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115667106695 + 115667106696.

It is an arithmetic number, because the mean of its divisors is an integer number (115667106696).

Almost surely, 2^231334213391 is an apocalyptic number.

231334213391 is a deficient number, since it is larger than the sum of its proper divisors (1).

231334213391 is an equidigital number, since it uses as much as digits as its factorization.

231334213391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 35.

The spelling of 231334213391 in words is "two hundred thirty-one billion, three hundred thirty-four million, two hundred thirteen thousand, three hundred ninety-one".