25555222 has 64 divisors (see below), whose sum is σ = 50761728. Its totient is φ = 9360000.

The previous prime is 25555219. The next prime is 25555223. The reversal of 25555222 is 22255552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252972 + ... + 253072.

It is an arithmetic number, because the mean of its divisors is an integer number (793152).

Almost surely, 2^25555222 is an apocalyptic number.

25555222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25555222 is a deficient number, since it is larger than the sum of its proper divisors (25206506).

25555222 is a wasteful number, since it uses less digits than its factorization.

25555222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205.

The product of its digits is 10000, while the sum is 28.

The square root of 25555222 is about 5055.2173049237. The cubic root of 25555222 is about 294.5505825605.

It can be divided in two parts, 2555 and 5222, that added together give a palindrome (7777).

The spelling of 25555222 in words is "twenty-five million, five hundred fifty-five thousand, two hundred twenty-two".