22221384 has 16 divisors (see below), whose sum is σ = 55553520. Its totient is φ = 7407120.

The previous prime is 22221377. The next prime is 22221391. The reversal of 22221384 is 48312222.

It is an interprime number because it is at equal distance from previous prime (22221377) and next prime (22221391).

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: 925891 = 22221384 / (2 + 2 + 2 + 2 + 1 + 3 + 8 + 4).

It is a nude number because it is divisible by every one of its digits.

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, 462922 + ... + 462969.

It is an arithmetic number, because the mean of its divisors is an integer number (3472095).

Almost surely, 2^22221384 is an apocalyptic number.

22221384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22221384 is an abundant number, since it is smaller than the sum of its proper divisors (33332136).

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

22221384 is a wasteful number, since it uses less digits than its factorization.

22221384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925900 (or 925896 counting only the distinct ones).

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

The square root of 22221384 is about 4713.9563001793. The cubic root of 22221384 is about 281.1406868028.

The spelling of 22221384 in words is "twenty-two million, two hundred twenty-one thousand, three hundred eighty-four".