25866222 has 8 divisors (see below), whose sum is σ = 51732456. Its totient is φ = 8622072.

The previous prime is 25866209. The next prime is 25866227. The reversal of 25866222 is 22266852.

It is a sphenic number, since it is the product of 3 distinct primes.

25866222 is an admirable number.

It is a super-2 number, since 2×25866222² = 1338122881106568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25866227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2155513 + ... + 2155524.

It is an arithmetic number, because the mean of its divisors is an integer number (6466557).

Almost surely, 2^25866222 is an apocalyptic number.

25866222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25866222 is a wasteful number, since it uses less digits than its factorization.

25866222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311042.

The product of its digits is 23040, while the sum is 33.

The square root of 25866222 is about 5085.8845838261. The cubic root of 25866222 is about 295.7406344399.

The spelling of 25866222 in words is "twenty-five million, eight hundred sixty-six thousand, two hundred twenty-two".