25551045251 has 2 divisors, whose sum is σ = 25551045252. Its totient is φ = 25551045250.

The previous prime is 25551045239. The next prime is 25551045313. The reversal of 25551045251 is 15254015552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25551045251 - 2⁶ = 25551045187 is a prime.

It is not a weakly prime, because it can be changed into another prime (25551048251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775522625 + 12775522626.

It is an arithmetic number, because the mean of its divisors is an integer number (12775522626).

Almost surely, 2^25551045251 is an apocalyptic number.

25551045251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551045251 is an equidigital number, since it uses as much as digits as its factorization.

25551045251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 25551045251 in words is "twenty-five billion, five hundred fifty-one million, forty-five thousand, two hundred fifty-one".