25223021251 has 2 divisors, whose sum is σ = 25223021252. Its totient is φ = 25223021250.

The previous prime is 25223021177. The next prime is 25223021267. The reversal of 25223021251 is 15212032252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25223021251 - 2⁷ = 25223021123 is a prime.

It is not a weakly prime, because it can be changed into another prime (25223021051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12611510625 + 12611510626.

It is an arithmetic number, because the mean of its divisors is an integer number (12611510626).

Almost surely, 2^25223021251 is an apocalyptic number.

25223021251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25223021251 is an equidigital number, since it uses as much as digits as its factorization.

25223021251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 25223021251 in words is "twenty-five billion, two hundred twenty-three million, twenty-one thousand, two hundred fifty-one".