2215299816 has 96 divisors (see below), whose sum is σ = 6204393000. Its totient is φ = 713525760.

The previous prime is 2215299811. The next prime is 2215299817. The reversal of 2215299816 is 6189925122.

It is a happy number.

2215299816 is a `hidden beast` number, since 2 + 21 + 529 + 98 + 16 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1746404100 + 468895716 = 41790^2 + 21654^2 .

It is not an unprimeable number, because it can be changed into a prime (2215299811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 394146 + ... + 399726.

Almost surely, 2^2215299816 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 2215299816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3102196500).

2215299816 is an abundant number, since it is smaller than the sum of its proper divisors (3989093184).

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

2215299816 is a wasteful number, since it uses less digits than its factorization.

2215299816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5779 (or 5772 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 2215299816 is about 47066.9716043002. The cubic root of 2215299816 is about 1303.5994557488.

The spelling of 2215299816 in words is "two billion, two hundred fifteen million, two hundred ninety-nine thousand, eight hundred sixteen".