1222500243 has 16 divisors (see below), whose sum is σ = 1727450496. Its totient is φ = 766362240.

The previous prime is 1222500199. The next prime is 1222500271. The reversal of 1222500243 is 3420052221.

It is not a de Polignac number, because 1222500243 - 2⁸ = 1222499987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222500143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49008 + ... + 69618.

It is an arithmetic number, because the mean of its divisors is an integer number (107965656).

Almost surely, 2^1222500243 is an apocalyptic number.

1222500243 is a deficient number, since it is larger than the sum of its proper divisors (504950253).

1222500243 is a wasteful number, since it uses less digits than its factorization.

1222500243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21794.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1222500243 is about 34964.2709490703. The cubic root of 1222500243 is about 1069.2591730514.

Adding to 1222500243 its reverse (3420052221), we get a palindrome (4642552464).

The spelling of 1222500243 in words is "one billion, two hundred twenty-two million, five hundred thousand, two hundred forty-three".