23128385251 has 2 divisors, whose sum is σ = 23128385252. Its totient is φ = 23128385250.

The previous prime is 23128385207. The next prime is 23128385353. The reversal of 23128385251 is 15258382132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23128385251 - 2¹⁵ = 23128352483 is a prime.

It is not a weakly prime, because it can be changed into another prime (23128385201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11564192625 + 11564192626.

It is an arithmetic number, because the mean of its divisors is an integer number (11564192626).

Almost surely, 2^23128385251 is an apocalyptic number.

23128385251 is a deficient number, since it is larger than the sum of its proper divisors (1).

23128385251 is an equidigital number, since it uses as much as digits as its factorization.

23128385251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The spelling of 23128385251 in words is "twenty-three billion, one hundred twenty-eight million, three hundred eighty-five thousand, two hundred fifty-one".