222319621 has 2 divisors, whose sum is σ = 222319622. Its totient is φ = 222319620.

The previous prime is 222319609. The next prime is 222319637. The reversal of 222319621 is 126913222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161010721 + 61308900 = 12689^2 + 7830^2 .

It is a cyclic number.

It is not a de Polignac number, because 222319621 - 2²¹ = 220222469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222319621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222319651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111159810 + 111159811.

It is an arithmetic number, because the mean of its divisors is an integer number (111159811).

Almost surely, 2^222319621 is an apocalyptic number.

It is an amenable number.

222319621 is a deficient number, since it is larger than the sum of its proper divisors (1).

222319621 is an equidigital number, since it uses as much as digits as its factorization.

222319621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 222319621 is about 14910.3863464365. The cubic root of 222319621 is about 605.7953440143.

The spelling of 222319621 in words is "two hundred twenty-two million, three hundred nineteen thousand, six hundred twenty-one".