12522222 has 16 divisors (see below), whose sum is σ = 27827280. Its totient is φ = 4174056.

The previous prime is 12522221. The next prime is 12522227. The reversal of 12522222 is 22222521.

It is a Harshad number since it is a multiple of its sum of digits (18).

12522222 is a modest number, since divided by 2222 gives 1252 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12522195 and 12522204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12522221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115893 + ... + 116000.

It is an arithmetic number, because the mean of its divisors is an integer number (1739205).

Almost surely, 2^12522222 is an apocalyptic number.

12522222 is an abundant number, since it is smaller than the sum of its proper divisors (15305058).

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

12522222 is a wasteful number, since it uses less digits than its factorization.

12522222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231904 (or 231898 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 12522222 is about 3538.6751758250. The cubic root of 12522222 is about 232.2168874470.

Adding to 12522222 its reverse (22222521), we get a palindrome (34744743).

The spelling of 12522222 in words is "twelve million, five hundred twenty-two thousand, two hundred twenty-two".