251255402423 has 2 divisors, whose sum is σ = 251255402424. Its totient is φ = 251255402422.

The previous prime is 251255402383. The next prime is 251255402441. The reversal of 251255402423 is 324204552152.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251255402423 - 2²² = 251251208119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251255402483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125627701211 + 125627701212.

It is an arithmetic number, because the mean of its divisors is an integer number (125627701212).

Almost surely, 2^251255402423 is an apocalyptic number.

251255402423 is a deficient number, since it is larger than the sum of its proper divisors (1).

251255402423 is an equidigital number, since it uses as much as digits as its factorization.

251255402423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 251255402423 its reverse (324204552152), we get a palindrome (575459954575).

The spelling of 251255402423 in words is "two hundred fifty-one billion, two hundred fifty-five million, four hundred two thousand, four hundred twenty-three".