25001251251 has 8 divisors (see below), whose sum is σ = 35089475520. Its totient is φ = 15790263912.

The previous prime is 25001251153. The next prime is 25001251309. The reversal of 25001251251 is 15215210052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25001251251 - 2⁷ = 25001251123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25001250251) 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 7 ways as a sum of consecutive naturals, for example, 219309165 + ... + 219309278.

It is an arithmetic number, because the mean of its divisors is an integer number (4386184440).

Almost surely, 2^25001251251 is an apocalyptic number.

25001251251 is a deficient number, since it is larger than the sum of its proper divisors (10088224269).

25001251251 is a wasteful number, since it uses less digits than its factorization.

25001251251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438618465.

The product of its (nonzero) digits is 1000, while the sum is 24.

The spelling of 25001251251 in words is "twenty-five billion, one million, two hundred fifty-one thousand, two hundred fifty-one".