220166321 has 8 divisors (see below), whose sum is σ = 228375840. Its totient is φ = 212097312.

The previous prime is 220166267. The next prime is 220166333. The reversal of 220166321 is 123661022.

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 220166321 - 2⁶ = 220166257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220166341) 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, 31931 + ... + 38208.

It is an arithmetic number, because the mean of its divisors is an integer number (28546980).

Almost surely, 2^220166321 is an apocalyptic number.

It is an amenable number.

220166321 is a deficient number, since it is larger than the sum of its proper divisors (8209519).

220166321 is an equidigital number, since it uses as much as digits as its factorization.

220166321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70255.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 220166321 is about 14838.0025946891. The cubic root of 220166321 is about 603.8331639045.

The spelling of 220166321 in words is "two hundred twenty million, one hundred sixty-six thousand, three hundred twenty-one".