22071224 has 16 divisors (see below), whose sum is σ = 47295600. Its totient is φ = 9459072.

The previous prime is 22071209. The next prime is 22071229. The reversal of 22071224 is 42217022.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22071196 and 22071205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22071229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197009 + ... + 197120.

It is an arithmetic number, because the mean of its divisors is an integer number (2955975).

Almost surely, 2^22071224 is an apocalyptic number.

It is an amenable number.

22071224 is an abundant number, since it is smaller than the sum of its proper divisors (25224376).

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

22071224 is a wasteful number, since it uses less digits than its factorization.

22071224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394142 (or 394138 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 22071224 is about 4698.0021285649. The cubic root of 22071224 is about 280.5059898336.

Subtracting from 22071224 its sum of digits (20), we obtain a square (22071204 = 4698²).

Adding to 22071224 its reverse (42217022), we get a palindrome (64288246).

The spelling of 22071224 in words is "twenty-two million, seventy-one thousand, two hundred twenty-four".