222887321 has 2 divisors, whose sum is σ = 222887322. Its totient is φ = 222887320.

The previous prime is 222887299. The next prime is 222887339. The reversal of 222887321 is 123788222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119661721 + 103225600 = 10939^2 + 10160^2 .

It is a cyclic number.

It is not a de Polignac number, because 222887321 - 2⁶ = 222887257 is a prime.

It is not a weakly prime, because it can be changed into another prime (222887381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111443660 + 111443661.

It is an arithmetic number, because the mean of its divisors is an integer number (111443661).

Almost surely, 2^222887321 is an apocalyptic number.

It is an amenable number.

222887321 is a deficient number, since it is larger than the sum of its proper divisors (1).

222887321 is an equidigital number, since it uses as much as digits as its factorization.

222887321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 35.

The square root of 222887321 is about 14929.4112743939. The cubic root of 222887321 is about 606.3105447593.

Subtracting from 222887321 its reverse (123788222), we obtain a palindrome (99099099).

The spelling of 222887321 in words is "two hundred twenty-two million, eight hundred eighty-seven thousand, three hundred twenty-one".