25220256 has 48 divisors (see below), whose sum is σ = 68493600. Its totient is φ = 8115968.

The previous prime is 25220191. The next prime is 25220257. The reversal of 25220256 is 65202252.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×25220256² = 1272122625411072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (25220257) 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, 1746 + ... + 7313.

It is an arithmetic number, because the mean of its divisors is an integer number (1426950).

Almost surely, 2^25220256 is an apocalyptic number.

It is an amenable number.

25220256 is an abundant number, since it is smaller than the sum of its proper divisors (43273344).

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

25220256 is a wasteful number, since it uses less digits than its factorization.

25220256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9101 (or 9093 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 25220256 is about 5021.9772998292. The cubic root of 25220256 is about 293.2579742135.

The spelling of 25220256 in words is "twenty-five million, two hundred twenty thousand, two hundred fifty-six".