1216560722 has 16 divisors (see below), whose sum is σ = 1966083840. Its totient is φ = 561240912.

The previous prime is 1216560721. The next prime is 1216560757. The reversal of 1216560722 is 2270656121.

It is a super-2 number, since 2×1216560722² = 2960039980626322568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1216560721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57983 + ... + 76125.

It is an arithmetic number, because the mean of its divisors is an integer number (122880240).

Almost surely, 2^1216560722 is an apocalyptic number.

1216560722 is a deficient number, since it is larger than the sum of its proper divisors (749523118).

1216560722 is a wasteful number, since it uses less digits than its factorization.

1216560722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20737.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1216560722 is about 34879.2305247693. The cubic root of 1216560722 is about 1067.5246947506.

The spelling of 1216560722 in words is "one billion, two hundred sixteen million, five hundred sixty thousand, seven hundred twenty-two".