1222255166 has 16 divisors (see below), whose sum is σ = 2064572928. Its totient is φ = 537648600.

The previous prime is 1222255159. The next prime is 1222255169. The reversal of 1222255166 is 6615522221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222255169) 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, 895400 + ... + 896763.

It is an arithmetic number, because the mean of its divisors is an integer number (129035808).

Almost surely, 2^1222255166 is an apocalyptic number.

1222255166 is a deficient number, since it is larger than the sum of its proper divisors (842317762).

1222255166 is a wasteful number, since it uses less digits than its factorization.

1222255166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792207.

The product of its digits is 14400, while the sum is 32.

The square root of 1222255166 is about 34960.7660957251. The cubic root of 1222255166 is about 1069.1877161212.

Adding to 1222255166 its reverse (6615522221), we get a palindrome (7837777387).

The spelling of 1222255166 in words is "one billion, two hundred twenty-two million, two hundred fifty-five thousand, one hundred sixty-six".