231310220969 has 2 divisors, whose sum is σ = 231310220970. Its totient is φ = 231310220968.

The previous prime is 231310220957. The next prime is 231310221019. The reversal of 231310220969 is 969022013132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204586145344 + 26724075625 = 452312^2 + 163475^2 .

It is a cyclic number.

It is not a de Polignac number, because 231310220969 - 2³⁶ = 162590744233 is a prime.

It is a super-2 number, since 2×231310220969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231310220069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115655110484 + 115655110485.

It is an arithmetic number, because the mean of its divisors is an integer number (115655110485).

Almost surely, 2^231310220969 is an apocalyptic number.

It is an amenable number.

231310220969 is a deficient number, since it is larger than the sum of its proper divisors (1).

231310220969 is an equidigital number, since it uses as much as digits as its factorization.

231310220969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The spelling of 231310220969 in words is "two hundred thirty-one billion, three hundred ten million, two hundred twenty thousand, nine hundred sixty-nine".