222336721 has 8 divisors (see below), whose sum is σ = 226733760. Its totient is φ = 217960752.

The previous prime is 222336701. The next prime is 222336769. The reversal of 222336721 is 127633222.

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 222336721 - 2⁷ = 222336593 is a prime.

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 222336721.

It is not an unprimeable number, because it can be changed into a prime (222336701) 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, 16956 + ... + 27058.

It is an arithmetic number, because the mean of its divisors is an integer number (28341720).

Almost surely, 2^222336721 is an apocalyptic number.

It is an amenable number.

222336721 is a deficient number, since it is larger than the sum of its proper divisors (4397039).

222336721 is a wasteful number, since it uses less digits than its factorization.

222336721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10535.

The product of its digits is 6048, while the sum is 28.

The square root of 222336721 is about 14910.9597611958. The cubic root of 222336721 is about 605.8108754592.

Adding to 222336721 its reverse (127633222), we get a palindrome (349969943).

The spelling of 222336721 in words is "two hundred twenty-two million, three hundred thirty-six thousand, seven hundred twenty-one".