222215243 has 2 divisors, whose sum is σ = 222215244. Its totient is φ = 222215242.

The previous prime is 222215239. The next prime is 222215249. The reversal of 222215243 is 342512222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222215243 - 2² = 222215239 is a prime.

It is a super-3 number, since 3×222215243³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (222215249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111107621 + 111107622.

It is an arithmetic number, because the mean of its divisors is an integer number (111107622).

Almost surely, 2^222215243 is an apocalyptic number.

222215243 is a deficient number, since it is larger than the sum of its proper divisors (1).

222215243 is an equidigital number, since it uses as much as digits as its factorization.

222215243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 23.

The square root of 222215243 is about 14906.8857579308. The cubic root of 222215243 is about 605.7005231668.

Adding to 222215243 its reverse (342512222), we get a palindrome (564727465).

The spelling of 222215243 in words is "two hundred twenty-two million, two hundred fifteen thousand, two hundred forty-three".