1222215564 has 12 divisors (see below), whose sum is σ = 2851836344. Its totient is φ = 407405184.

The previous prime is 1222215559. The next prime is 1222215569. The reversal of 1222215564 is 4655122221.

It is an interprime number because it is at equal distance from previous prime (1222215559) and next prime (1222215569).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1222215569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50925637 + ... + 50925660.

Almost surely, 2^1222215564 is an apocalyptic number.

It is an amenable number.

1222215564 is an abundant number, since it is smaller than the sum of its proper divisors (1629620780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222215564 is a wasteful number, since it uses less digits than its factorization.

1222215564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101851304 (or 101851302 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 1222215564 is about 34960.1997133884. The cubic root of 1222215564 is about 1069.1761684972.

Adding to 1222215564 its reverse (4655122221), we get a palindrome (5877337785).

The spelling of 1222215564 in words is "one billion, two hundred twenty-two million, two hundred fifteen thousand, five hundred sixty-four".