25252521251 has 4 divisors (see below), whose sum is σ = 25296746904. Its totient is φ = 25208295600.

The previous prime is 25252521241. The next prime is 25252521257. The reversal of 25252521251 is 15212525252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25252521251 - 2⁶ = 25252521187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25252521257) 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 in 3 ways as a sum of consecutive naturals, for example, 22111970 + ... + 22113111.

It is an arithmetic number, because the mean of its divisors is an integer number (6324186726).

Almost surely, 2^25252521251 is an apocalyptic number.

25252521251 is a deficient number, since it is larger than the sum of its proper divisors (44225653).

25252521251 is an equidigital number, since it uses as much as digits as its factorization.

25252521251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44225652.

The product of its digits is 20000, while the sum is 32.

The spelling of 25252521251 in words is "twenty-five billion, two hundred fifty-two million, five hundred twenty-one thousand, two hundred fifty-one".