25255251 has 24 divisors (see below), whose sum is σ = 44145504. Its totient is φ = 13582080.

The previous prime is 25255249. The next prime is 25255271. The reversal of 25255251 is 15255252.

It is not a de Polignac number, because 25255251 - 2¹ = 25255249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25255271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10720 + ... + 12861.

It is an arithmetic number, because the mean of its divisors is an integer number (1839396).

Almost surely, 2^25255251 is an apocalyptic number.

25255251 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25255251 is a deficient number, since it is larger than the sum of its proper divisors (18890253).

25255251 is a wasteful number, since it uses less digits than its factorization.

25255251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23611 (or 23608 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 25255251 is about 5025.4602774273. The cubic root of 25255251 is about 293.3935506826.

Subtracting from 25255251 its reverse (15255252), we obtain a palindrome (9999999).

It can be divided in two parts, 2525 and 5251, that added together give a 5-th power (7776 = 6⁵).

The spelling of 25255251 in words is "twenty-five million, two hundred fifty-five thousand, two hundred fifty-one".