222808181 has 2 divisors, whose sum is σ = 222808182. Its totient is φ = 222808180.

The previous prime is 222808163. The next prime is 222808217. The reversal of 222808181 is 181808222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122988100 + 99820081 = 11090^2 + 9991^2 .

It is a cyclic number.

It is not a de Polignac number, because 222808181 - 2²² = 218613877 is a prime.

It is a super-2 number, since 2×222808181² = 99286971041057522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222808141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111404090 + 111404091.

It is an arithmetic number, because the mean of its divisors is an integer number (111404091).

Almost surely, 2^222808181 is an apocalyptic number.

It is an amenable number.

222808181 is a deficient number, since it is larger than the sum of its proper divisors (1).

222808181 is an equidigital number, since it uses as much as digits as its factorization.

222808181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 222808181 is about 14926.7605661778. The cubic root of 222808181 is about 606.2387759144.

The spelling of 222808181 in words is "two hundred twenty-two million, eight hundred eight thousand, one hundred eighty-one".