222166001 has 2 divisors, whose sum is σ = 222166002. Its totient is φ = 222166000.

The previous prime is 222165997. The next prime is 222166027. The reversal of 222166001 is 100661222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213160000 + 9006001 = 14600^2 + 3001^2 .

It is a cyclic number.

It is not a de Polignac number, because 222166001 - 2² = 222165997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (222166501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111083000 + 111083001.

It is an arithmetic number, because the mean of its divisors is an integer number (111083001).

Almost surely, 2^222166001 is an apocalyptic number.

It is an amenable number.

222166001 is a deficient number, since it is larger than the sum of its proper divisors (1).

222166001 is an equidigital number, since it uses as much as digits as its factorization.

222166001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 222166001 is about 14905.2340135940. The cubic root of 222166001 is about 605.6557795987.

The spelling of 222166001 in words is "two hundred twenty-two million, one hundred sixty-six thousand, one".