2216152521 has 64 divisors (see below), whose sum is σ = 3914956800. Its totient is φ = 1223251200.

The previous prime is 2216152439. The next prime is 2216152531. The reversal of 2216152521 is 1252516122.

2216152521 is a `hidden beast` number, since 2 + 2 + 1 + 615 + 25 + 21 = 666.

It is not a de Polignac number, because 2216152521 - 2¹¹ = 2216150473 is a prime.

It is a super-2 number, since 2×2216152521² = 9822663992669310882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2216152531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 149440 + ... + 163598.

It is an arithmetic number, because the mean of its divisors is an integer number (61171200).

Almost surely, 2^2216152521 is an apocalyptic number.

It is an amenable number.

2216152521 is a deficient number, since it is larger than the sum of its proper divisors (1698804279).

2216152521 is a wasteful number, since it uses less digits than its factorization.

2216152521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14227 (or 14221 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 2216152521 is about 47076.0291549744. The cubic root of 2216152521 is about 1303.7666931846.

Adding to 2216152521 its reverse (1252516122), we get a palindrome (3468668643).

The spelling of 2216152521 in words is "two billion, two hundred sixteen million, one hundred fifty-two thousand, five hundred twenty-one".