221361222 has 16 divisors (see below), whose sum is σ = 443483712. Its totient is φ = 73660200.

The previous prime is 221361197. The next prime is 221361227. The reversal of 221361222 is 222163122.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221361227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27904 + ... + 34947.

It is an arithmetic number, because the mean of its divisors is an integer number (27717732).

Almost surely, 2^221361222 is an apocalyptic number.

221361222 is an abundant number, since it is smaller than the sum of its proper divisors (222122490).

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

221361222 is a wasteful number, since it uses less digits than its factorization.

221361222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63443.

The product of its digits is 576, while the sum is 21.

The square root of 221361222 is about 14878.2129975343. The cubic root of 221361222 is about 604.9235811772.

The spelling of 221361222 in words is "two hundred twenty-one million, three hundred sixty-one thousand, two hundred twenty-two".