222809849 has 2 divisors, whose sum is σ = 222809850. Its totient is φ = 222809848.

The previous prime is 222809833. The next prime is 222809863. The reversal of 222809849 is 948908222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149621824 + 73188025 = 12232^2 + 8555^2 .

It is a cyclic number.

It is not a de Polignac number, because 222809849 - 2⁴ = 222809833 is a prime.

It is a super-2 number, since 2×222809849² = 99288457622805602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222809869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111404924 + 111404925.

It is an arithmetic number, because the mean of its divisors is an integer number (111404925).

Almost surely, 2^222809849 is an apocalyptic number.

It is an amenable number.

222809849 is a deficient number, since it is larger than the sum of its proper divisors (1).

222809849 is an equidigital number, since it uses as much as digits as its factorization.

222809849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 222809849 is about 14926.8164388794. The cubic root of 222809849 is about 606.2402887310.

The spelling of 222809849 in words is "two hundred twenty-two million, eight hundred nine thousand, eight hundred forty-nine".