25885221 has 4 divisors (see below), whose sum is σ = 34513632. Its totient is φ = 17256812.

The previous prime is 25885213. The next prime is 25885229. The reversal of 25885221 is 12258852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (25885213) and next prime (25885229).

It is a cyclic number.

It is not a de Polignac number, because 25885221 - 2³ = 25885213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25885229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4314201 + ... + 4314206.

It is an arithmetic number, because the mean of its divisors is an integer number (8628408).

Almost surely, 2^25885221 is an apocalyptic number.

It is an amenable number.

25885221 is a deficient number, since it is larger than the sum of its proper divisors (8628411).

25885221 is an equidigital number, since it uses as much as digits as its factorization.

25885221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8628410.

The product of its digits is 12800, while the sum is 33.

The square root of 25885221 is about 5087.7520576380. The cubic root of 25885221 is about 295.8130248749.

It can be divided in two parts, 25885 and 221, that added together give a triangular number (26106 = T₂₂₈).

The spelling of 25885221 in words is "twenty-five million, eight hundred eighty-five thousand, two hundred twenty-one".