25001113251 has 4 divisors (see below), whose sum is σ = 33334817672. Its totient is φ = 16667408832.

The previous prime is 25001113217. The next prime is 25001113261. The reversal of 25001113251 is 15231110052.

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

It is not a de Polignac number, because 25001113251 - 2⁶ = 25001113187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25001113211) 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 in 3 ways as a sum of consecutive naturals, for example, 4166852206 + ... + 4166852211.

It is an arithmetic number, because the mean of its divisors is an integer number (8333704418).

Almost surely, 2^25001113251 is an apocalyptic number.

25001113251 is a deficient number, since it is larger than the sum of its proper divisors (8333704421).

25001113251 is an equidigital number, since it uses as much as digits as its factorization.

25001113251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8333704420.

The product of its (nonzero) digits is 300, while the sum is 21.

The spelling of 25001113251 in words is "twenty-five billion, one million, one hundred thirteen thousand, two hundred fifty-one".