220166239 has 2 divisors, whose sum is σ = 220166240. Its totient is φ = 220166238.

The previous prime is 220166227. The next prime is 220166251. The reversal of 220166239 is 932661022.

It is a balanced prime because it is at equal distance from previous prime (220166227) and next prime (220166251).

It is a cyclic number.

It is not a de Polignac number, because 220166239 - 2⁵ = 220166207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220166239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220166039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110083119 + 110083120.

It is an arithmetic number, because the mean of its divisors is an integer number (110083120).

Almost surely, 2^220166239 is an apocalyptic number.

220166239 is a deficient number, since it is larger than the sum of its proper divisors (1).

220166239 is an equidigital number, since it uses as much as digits as its factorization.

220166239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 220166239 is about 14837.9998315137. Note that the first 3 decimals coincide. The cubic root of 220166239 is about 603.8330889394.

The spelling of 220166239 in words is "two hundred twenty million, one hundred sixty-six thousand, two hundred thirty-nine".