220166243 has 32 divisors (see below), whose sum is σ = 263969280. Its totient is φ = 181440000.

The previous prime is 220166239. The next prime is 220166251. The reversal of 220166243 is 342661022.

It is a Cunningham number, because it is equal to 14838²-1.

It is a cyclic number.

It is not a de Polignac number, because 220166243 - 2² = 220166239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220166203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 548843 + ... + 549243.

It is an arithmetic number, because the mean of its divisors is an integer number (8249040).

Almost surely, 2^220166243 is an apocalyptic number.

220166243 is a deficient number, since it is larger than the sum of its proper divisors (43803037).

220166243 is a wasteful number, since it uses less digits than its factorization.

220166243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 220166243 is about 14837.9999663027. Note that the first 4 decimals coincide. The cubic root of 220166243 is about 603.8330925963.

The spelling of 220166243 in words is "two hundred twenty million, one hundred sixty-six thousand, two hundred forty-three".