25525505251 has 8 divisors (see below), whose sum is σ = 25816305024. Its totient is φ = 25235844480.

The previous prime is 25525505233. The next prime is 25525505311. The reversal of 25525505251 is 15250552552.

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

It is a cyclic number.

It is not a de Polignac number, because 25525505251 - 2²⁵ = 25491950819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25525505251.

It is not an unprimeable number, because it can be changed into a prime (25525545251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239635 + ... + 329356.

It is an arithmetic number, because the mean of its divisors is an integer number (3227038128).

Almost surely, 2^25525505251 is an apocalyptic number.

25525505251 is a deficient number, since it is larger than the sum of its proper divisors (290799773).

25525505251 is a wasteful number, since it uses less digits than its factorization.

25525505251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569501.

The product of its (nonzero) digits is 125000, while the sum is 37.

The spelling of 25525505251 in words is "twenty-five billion, five hundred twenty-five million, five hundred five thousand, two hundred fifty-one".