182215221 has 4 divisors (see below), whose sum is σ = 242953632. Its totient is φ = 121476812.

The previous prime is 182215217. The next prime is 182215237. The reversal of 182215221 is 122512281.

182215221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 182215221 - 2² = 182215217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 182215191 and 182215200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (182215921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30369201 + ... + 30369206.

It is an arithmetic number, because the mean of its divisors is an integer number (60738408).

Almost surely, 2^182215221 is an apocalyptic number.

It is an amenable number.

182215221 is a deficient number, since it is larger than the sum of its proper divisors (60738411).

182215221 is an equidigital number, since it uses as much as digits as its factorization.

182215221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60738410.

The product of its digits is 640, while the sum is 24.

The square root of 182215221 is about 13498.7118274301. The cubic root of 182215221 is about 566.9284053072.

The spelling of 182215221 in words is "one hundred eighty-two million, two hundred fifteen thousand, two hundred twenty-one".