25255255251 has 8 divisors (see below), whose sum is σ = 33683820480. Its totient is φ = 16831763432.

The previous prime is 25255255229. The next prime is 25255255307. The reversal of 25255255251 is 15255255252.

It is a happy number.

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 25255255251 - 2⁵ = 25255255219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25255255651) 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, 1256721 + ... + 1276658.

It is an arithmetic number, because the mean of its divisors is an integer number (4210477560).

Almost surely, 2^25255255251 is an apocalyptic number.

25255255251 is a deficient number, since it is larger than the sum of its proper divisors (8428565229).

25255255251 is a wasteful number, since it uses less digits than its factorization.

25255255251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536705.

The product of its digits is 250000, while the sum is 39.

Subtracting from 25255255251 its reverse (15255255252), we obtain a palindrome (9999999999).

The spelling of 25255255251 in words is "twenty-five billion, two hundred fifty-five million, two hundred fifty-five thousand, two hundred fifty-one".