231311133019 has 2 divisors, whose sum is σ = 231311133020. Its totient is φ = 231311133018.

The previous prime is 231311132999. The next prime is 231311133037. The reversal of 231311133019 is 910331113132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231311133019 - 2⁷ = 231311132891 is a prime.

It is a super-2 number, since 2×231311133019² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231311131019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115655566509 + 115655566510.

It is an arithmetic number, because the mean of its divisors is an integer number (115655566510).

Almost surely, 2^231311133019 is an apocalyptic number.

231311133019 is a deficient number, since it is larger than the sum of its proper divisors (1).

231311133019 is an equidigital number, since it uses as much as digits as its factorization.

231311133019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The spelling of 231311133019 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred thirty-three thousand, nineteen".