22381224 has 32 divisors (see below), whose sum is σ = 56364000. Its totient is φ = 7405632.

The previous prime is 22381223. The next prime is 22381241. The reversal of 22381224 is 42218322.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a junction number, because it is equal to n+sod(n) for n = 22381194 and 22381203.

It is not an unprimeable number, because it can be changed into a prime (22381223) 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, 19 + ... + 6690.

It is an arithmetic number, because the mean of its divisors is an integer number (1761375).

Almost surely, 2^22381224 is an apocalyptic number.

22381224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22381224 is an abundant number, since it is smaller than the sum of its proper divisors (33982776).

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

22381224 is a wasteful number, since it uses less digits than its factorization.

22381224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6857 (or 6853 counting only the distinct ones).

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

The square root of 22381224 is about 4730.8798336039. The cubic root of 22381224 is about 281.8131653129.

Adding to 22381224 its reverse (42218322), we get a palindrome (64599546).

The spelling of 22381224 in words is "twenty-two million, three hundred eighty-one thousand, two hundred twenty-four".