1222443861 has 16 divisors (see below), whose sum is σ = 1684041216. Its totient is φ = 788273136.

The previous prime is 1222443847. The next prime is 1222443883. The reversal of 1222443861 is 1683442221.

It is not a de Polignac number, because 1222443861 - 2⁶ = 1222443797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222443811) 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, 32715 + ... + 59288.

It is an arithmetic number, because the mean of its divisors is an integer number (105252576).

Almost surely, 2^1222443861 is an apocalyptic number.

It is an amenable number.

1222443861 is a deficient number, since it is larger than the sum of its proper divisors (461597355).

1222443861 is a wasteful number, since it uses less digits than its factorization.

1222443861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92152.

The product of its digits is 18432, while the sum is 33.

The square root of 1222443861 is about 34963.4646595557. The cubic root of 1222443861 is about 1069.2427346368.

The spelling of 1222443861 in words is "one billion, two hundred twenty-two million, four hundred forty-three thousand, eight hundred sixty-one".