2216121716 has 24 divisors (see below), whose sum is σ = 3938767560. Its totient is φ = 1090867712.

The previous prime is 2216121703. The next prime is 2216121767. The reversal of 2216121716 is 6171216122.

It can be written as a sum of positive squares in 4 ways, for example, as 19324816 + 2196796900 = 4396^2 + 46870^2 .

It is a super-2 number, since 2×2216121716² = 9822390920253569312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69590 + ... + 96306.

It is an arithmetic number, because the mean of its divisors is an integer number (164115315).

Almost surely, 2^2216121716 is an apocalyptic number.

It is an amenable number.

2216121716 is a deficient number, since it is larger than the sum of its proper divisors (1722645844).

2216121716 is a wasteful number, since it uses less digits than its factorization.

2216121716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27043 (or 27041 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 2216121716 is about 47075.7019703371. The cubic root of 2216121716 is about 1303.7606522768.

Adding to 2216121716 its reverse (6171216122), we get a palindrome (8387337838).

The spelling of 2216121716 in words is "two billion, two hundred sixteen million, one hundred twenty-one thousand, seven hundred sixteen".