231311133329 has 2 divisors, whose sum is σ = 231311133330. Its totient is φ = 231311133328.

The previous prime is 231311133281. The next prime is 231311133337. The reversal of 231311133329 is 923331113132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231214799104 + 96334225 = 480848^2 + 9815^2 .

It is a cyclic number.

It is not a de Polignac number, because 231311133329 - 2²⁴ = 231294356113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231311133295 and 231311133304.

It is not a weakly prime, because it can be changed into another prime (231311132329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115655566664 + 115655566665.

It is an arithmetic number, because the mean of its divisors is an integer number (115655566665).

Almost surely, 2^231311133329 is an apocalyptic number.

It is an amenable number.

231311133329 is a deficient number, since it is larger than the sum of its proper divisors (1).

231311133329 is an equidigital number, since it uses as much as digits as its factorization.

231311133329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 32.

The spelling of 231311133329 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred thirty-three thousand, three hundred twenty-nine".