220157217 has 16 divisors (see below), whose sum is σ = 372753280. Its totient is φ = 125804016.

The previous prime is 220157213. The next prime is 220157221. The reversal of 220157217 is 712751022.

220157217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (220157213) and next prime (220157221).

It is not a de Polignac number, because 220157217 - 2² = 220157213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220157213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 582238 + ... + 582615.

It is an arithmetic number, because the mean of its divisors is an integer number (23297080).

Almost surely, 2^220157217 is an apocalyptic number.

220157217 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

220157217 is a deficient number, since it is larger than the sum of its proper divisors (152596063).

220157217 is a wasteful number, since it uses less digits than its factorization.

220157217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164869 (or 1164863 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 220157217 is about 14837.6958116818. The cubic root of 220157217 is about 603.8248408439.

The spelling of 220157217 in words is "two hundred twenty million, one hundred fifty-seven thousand, two hundred seventeen".