2182730221 has 8 divisors (see below), whose sum is σ = 2531781440. Its totient is φ = 1842987168.

The previous prime is 2182730213. The next prime is 2182730239. The reversal of 2182730221 is 1220372812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2182730221 - 2³ = 2182730213 is a prime.

It is a super-2 number, since 2×2182730221² = 9528622435333417682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2182730221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2182730201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2326536 + ... + 2327473.

It is an arithmetic number, because the mean of its divisors is an integer number (316472680).

Almost surely, 2^2182730221 is an apocalyptic number.

It is an amenable number.

2182730221 is a deficient number, since it is larger than the sum of its proper divisors (349051219).

2182730221 is an equidigital number, since it uses as much as digits as its factorization.

2182730221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4654083.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 2182730221 is about 46719.6984258246. The cubic root of 2182730221 is about 1297.1793322271.

The spelling of 2182730221 in words is "two billion, one hundred eighty-two million, seven hundred thirty thousand, two hundred twenty-one".