1215222568 has 64 divisors (see below), whose sum is σ = 2696601600. Its totient is φ = 502407360.

The previous prime is 1215222563. The next prime is 1215222623. The reversal of 1215222568 is 8652225121.

It is not an unprimeable number, because it can be changed into a prime (1215222563) 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, 657021 + ... + 658867.

It is an arithmetic number, because the mean of its divisors is an integer number (42134400).

Almost surely, 2^1215222568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215222568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348300800).

1215222568 is an abundant number, since it is smaller than the sum of its proper divisors (1481379032).

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

1215222568 is a wasteful number, since it uses less digits than its factorization.

1215222568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270 (or 2266 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 1215222568 is about 34860.0425702551. The cubic root of 1215222568 is about 1067.1331437993.

Adding to 1215222568 its reverse (8652225121), we get a palindrome (9867447689).

The spelling of 1215222568 in words is "one billion, two hundred fifteen million, two hundred twenty-two thousand, five hundred sixty-eight".