1222225646 has 16 divisors (see below), whose sum is σ = 1869442848. Its totient is φ = 599143200.

The previous prime is 1222225603. The next prime is 1222225661. The reversal of 1222225646 is 6465222221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21836 + ... + 54048.

It is an arithmetic number, because the mean of its divisors is an integer number (116840178).

Almost surely, 2^1222225646 is an apocalyptic number.

1222225646 is a deficient number, since it is larger than the sum of its proper divisors (647217202).

1222225646 is a wasteful number, since it uses less digits than its factorization.

1222225646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32587.

The product of its digits is 23040, while the sum is 32.

The square root of 1222225646 is about 34960.3439056311. The cubic root of 1222225646 is about 1069.1791083508.

Adding to 1222225646 its reverse (6465222221), we get a palindrome (7687447867).

The spelling of 1222225646 in words is "one billion, two hundred twenty-two million, two hundred twenty-five thousand, six hundred forty-six".