220221384 has 16 divisors (see below), whose sum is σ = 550553520. Its totient is φ = 73407120.

The previous prime is 220221377. The next prime is 220221403. The reversal of 220221384 is 483122022.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 9175891 = 220221384 / (2 + 2 + 0 + 2 + 2 + 1 + 3 + 8 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4587922 + ... + 4587969.

It is an arithmetic number, because the mean of its divisors is an integer number (34409595).

Almost surely, 2^220221384 is an apocalyptic number.

220221384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

220221384 is an abundant number, since it is smaller than the sum of its proper divisors (330332136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220221384 is a wasteful number, since it uses less digits than its factorization.

220221384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9175900 (or 9175896 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 220221384 is about 14839.8579508026. The cubic root of 220221384 is about 603.8834987209.

The spelling of 220221384 in words is "two hundred twenty million, two hundred twenty-one thousand, three hundred eighty-four".