222166181 has 8 divisors (see below), whose sum is σ = 231700224. Its totient is φ = 212780160.

The previous prime is 222166169. The next prime is 222166193. The reversal of 222166181 is 181661222.

It is an interprime number because it is at equal distance from previous prime (222166169) and next prime (222166193).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222166181 - 2⁶ = 222166117 is a prime.

It is a super-2 number, since 2×222166181² = 98715623960249522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222166121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33935 + ... + 39948.

It is an arithmetic number, because the mean of its divisors is an integer number (28962528).

Almost surely, 2^222166181 is an apocalyptic number.

It is an amenable number.

222166181 is a deficient number, since it is larger than the sum of its proper divisors (9534043).

222166181 is an equidigital number, since it uses as much as digits as its factorization.

222166181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74011.

The product of its digits is 2304, while the sum is 29.

The square root of 222166181 is about 14905.2400517402. The cubic root of 222166181 is about 605.6559431671.

The spelling of 222166181 in words is "two hundred twenty-two million, one hundred sixty-six thousand, one hundred eighty-one".