222638243 has 2 divisors, whose sum is σ = 222638244. Its totient is φ = 222638242.

The previous prime is 222638237. The next prime is 222638261. The reversal of 222638243 is 342836222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222638243 - 2¹² = 222634147 is a prime.

It is a super-2 number, since 2×222638243² = 99135574492254098, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222638203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111319121 + 111319122.

It is an arithmetic number, because the mean of its divisors is an integer number (111319122).

Almost surely, 2^222638243 is an apocalyptic number.

222638243 is a deficient number, since it is larger than the sum of its proper divisors (1).

222638243 is an equidigital number, since it uses as much as digits as its factorization.

222638243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 32.

The square root of 222638243 is about 14921.0670865056. The cubic root of 222638243 is about 606.0846086123.

The spelling of 222638243 in words is "two hundred twenty-two million, six hundred thirty-eight thousand, two hundred forty-three".