1222443999 has 24 divisors (see below), whose sum is σ = 2072547360. Its totient is φ = 679658688.

The previous prime is 1222443967. The next prime is 1222444039. The reversal of 1222443999 is 9993442221.

1222443999 is a `hidden beast` number, since 12 + 2 + 244 + 399 + 9 = 666.

It is not a de Polignac number, because 1222443999 - 2⁵ = 1222443967 is a prime.

It is a super-2 number, since 2×1222443999² = 2988738661382224002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222443799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259884 + ... + 264545.

It is an arithmetic number, because the mean of its divisors is an integer number (86356140).

Almost surely, 2^1222443999 is an apocalyptic number.

1222443999 is a deficient number, since it is larger than the sum of its proper divisors (850103361).

1222443999 is a wasteful number, since it uses less digits than its factorization.

1222443999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524479 (or 524476 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 1222443999 is about 34963.4666330443. The cubic root of 1222443999 is about 1069.2427748719.

The spelling of 1222443999 in words is "one billion, two hundred twenty-two million, four hundred forty-three thousand, nine hundred ninety-nine".