25505256 has 32 divisors (see below), whose sum is σ = 72872640. Its totient is φ = 7287168.

The previous prime is 25505231. The next prime is 25505261. The reversal of 25505256 is 65250552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75741 + ... + 76076.

It is an arithmetic number, because the mean of its divisors is an integer number (2277270).

Almost surely, 2^25505256 is an apocalyptic number.

It is an amenable number.

25505256 is an abundant number, since it is smaller than the sum of its proper divisors (47367384).

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

25505256 is a wasteful number, since it uses less digits than its factorization.

25505256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151833 (or 151829 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 25505256 is about 5050.2728639154. The cubic root of 25505256 is about 294.3584872252.

The spelling of 25505256 in words is "twenty-five million, five hundred five thousand, two hundred fifty-six".