23313222991 has 2 divisors, whose sum is σ = 23313222992. Its totient is φ = 23313222990.

The previous prime is 23313222979. The next prime is 23313223057. The reversal of 23313222991 is 19922231332.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23313222991 - 2⁹ = 23313222479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23313222991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23313222941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11656611495 + 11656611496.

It is an arithmetic number, because the mean of its divisors is an integer number (11656611496).

Almost surely, 2^23313222991 is an apocalyptic number.

23313222991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23313222991 is an equidigital number, since it uses as much as digits as its factorization.

23313222991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 37.

The spelling of 23313222991 in words is "twenty-three billion, three hundred thirteen million, two hundred twenty-two thousand, nine hundred ninety-one".