25522222 has 16 divisors (see below), whose sum is σ = 42653952. Its totient is φ = 11353720.

The previous prime is 25522201. The next prime is 25522229. The reversal of 25522222 is 22222552.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 25522193 and 25522202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25522229) 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, 11308 + ... + 13375.

It is an arithmetic number, because the mean of its divisors is an integer number (2665872).

Almost surely, 2^25522222 is an apocalyptic number.

25522222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25522222 is a deficient number, since it is larger than the sum of its proper divisors (17131730).

25522222 is a wasteful number, since it uses less digits than its factorization.

25522222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24743.

The product of its digits is 1600, while the sum is 22.

The square root of 25522222 is about 5051.9522958951. The cubic root of 25522222 is about 294.4237414765.

Adding to 25522222 its reverse (22222552), we get a palindrome (47744774).

It can be divided in two parts, 2552 and 2222, that added together give a palindrome (4774).

The spelling of 25522222 in words is "twenty-five million, five hundred twenty-two thousand, two hundred twenty-two".