222968621 has 4 divisors (see below), whose sum is σ = 223894044. Its totient is φ = 222043200.

The previous prime is 222968579. The next prime is 222968639. The reversal of 222968621 is 126869222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64561225 + 158407396 = 8035^2 + 12586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222968621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222968671) 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, 462350 + ... + 462831.

It is an arithmetic number, because the mean of its divisors is an integer number (55973511).

Almost surely, 2^222968621 is an apocalyptic number.

It is an amenable number.

222968621 is a deficient number, since it is larger than the sum of its proper divisors (925423).

222968621 is an equidigital number, since it uses as much as digits as its factorization.

222968621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925422.

The product of its digits is 41472, while the sum is 38.

The square root of 222968621 is about 14932.1338394752. The cubic root of 222968621 is about 606.3842547322.

The spelling of 222968621 in words is "two hundred twenty-two million, nine hundred sixty-eight thousand, six hundred twenty-one".