25228881 has 8 divisors (see below), whose sum is σ = 37376160. Its totient is φ = 16819236.

The previous prime is 25228871. The next prime is 25228913. The reversal of 25228881 is 18882252.

It is a happy number.

It is not a de Polignac number, because 25228881 - 2⁵ = 25228849 is a prime.

It is a super-2 number, since 2×25228881² = 1272992873024322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25228871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467175 + ... + 467228.

It is an arithmetic number, because the mean of its divisors is an integer number (4672020).

Almost surely, 2^25228881 is an apocalyptic number.

It is an amenable number.

25228881 is a deficient number, since it is larger than the sum of its proper divisors (12147279).

25228881 is an equidigital number, since it uses as much as digits as its factorization.

25228881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934412 (or 934406 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The square root of 25228881 is about 5022.8359519299. The cubic root of 25228881 is about 293.2914005428.

The spelling of 25228881 in words is "twenty-five million, two hundred twenty-eight thousand, eight hundred eighty-one".