1222243209 has 16 divisors (see below), whose sum is σ = 1975343040. Its totient is φ = 740753280.

The previous prime is 1222243181. The next prime is 1222243213. The reversal of 1222243209 is 9023422221.

1222243209 is a `hidden beast` number, since 1 + 2 + 222 + 432 + 0 + 9 = 666.

1222243209 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1222243209 - 2⁷ = 1222243081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1222243219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2057352 + ... + 2057945.

It is an arithmetic number, because the mean of its divisors is an integer number (123458940).

Almost surely, 2^1222243209 is an apocalyptic number.

It is an amenable number.

1222243209 is a deficient number, since it is larger than the sum of its proper divisors (753099831).

1222243209 is a wasteful number, since it uses less digits than its factorization.

1222243209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115317 (or 4115311 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1222243209 is about 34960.5950893288. The cubic root of 1222243209 is about 1069.1842295827.

The spelling of 1222243209 in words is "one billion, two hundred twenty-two million, two hundred forty-three thousand, two hundred nine".