222493921 has 8 divisors (see below), whose sum is σ = 245453544. Its totient is φ = 200369280.

The previous prime is 222493903. The next prime is 222493951. The reversal of 222493921 is 129394222.

It can be written as a sum of positive squares in 4 ways, for example, as 18318400 + 204175521 = 4280^2 + 14289^2 .

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 222493921 - 2⁵ = 222493889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222493951) 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, 208186 + ... + 209251.

It is an arithmetic number, because the mean of its divisors is an integer number (30681693).

Almost surely, 2^222493921 is an apocalyptic number.

It is an amenable number.

222493921 is a deficient number, since it is larger than the sum of its proper divisors (22959623).

222493921 is a wasteful number, since it uses less digits than its factorization.

222493921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417491.

The product of its digits is 15552, while the sum is 34.

The square root of 222493921 is about 14916.2301202415. The cubic root of 222493921 is about 605.9536184625.

The spelling of 222493921 in words is "two hundred twenty-two million, four hundred ninety-three thousand, nine hundred twenty-one".