25512222 has 8 divisors (see below), whose sum is σ = 51024456. Its totient is φ = 8504072.

The previous prime is 25512197. The next prime is 25512241. The reversal of 25512222 is 22221552.

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

25512222 is an admirable number.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2126013 + ... + 2126024.

It is an arithmetic number, because the mean of its divisors is an integer number (6378057).

Almost surely, 2^25512222 is an apocalyptic number.

25512222 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.

25512222 is a wasteful number, since it uses less digits than its factorization.

25512222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252042.

The product of its digits is 800, while the sum is 21.

The square root of 25512222 is about 5050.9624825374. The cubic root of 25512222 is about 294.3852831997.

Adding to 25512222 its reverse (22221552), we get a palindrome (47733774).

The spelling of 25512222 in words is "twenty-five million, five hundred twelve thousand, two hundred twenty-two".