25215256 has 32 divisors (see below), whose sum is σ = 52105680. Its totient is φ = 11344000.

The previous prime is 25215251. The next prime is 25215263. The reversal of 25215256 is 65251252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25215251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7470 + ... + 10306.

Almost surely, 2^25215256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25215256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26052840).

25215256 is an abundant number, since it is smaller than the sum of its proper divisors (26890424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25215256 is a wasteful number, since it uses less digits than its factorization.

25215256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2955 (or 2951 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 25215256 is about 5021.4794632658. The cubic root of 25215256 is about 293.2385931417.

It can be divided in two parts, 2521 and 5256, that added together give a palindrome (7777).

The spelling of 25215256 in words is "twenty-five million, two hundred fifteen thousand, two hundred fifty-six".