23243375081 has 2 divisors, whose sum is σ = 23243375082. Its totient is φ = 23243375080.

The previous prime is 23243375063. The next prime is 23243375117. The reversal of 23243375081 is 18057334232.

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., 18310419856 + 4932955225 = 135316^2 + 70235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23243375081 is a prime.

It is a super-2 number, since 2×23243375081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23243375011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11621687540 + 11621687541.

It is an arithmetic number, because the mean of its divisors is an integer number (11621687541).

Almost surely, 2^23243375081 is an apocalyptic number.

It is an amenable number.

23243375081 is a deficient number, since it is larger than the sum of its proper divisors (1).

23243375081 is an equidigital number, since it uses as much as digits as its factorization.

23243375081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 23243375081 in words is "twenty-three billion, two hundred forty-three million, three hundred seventy-five thousand, eighty-one".