21224362 has 8 divisors (see below), whose sum is σ = 31890816. Its totient is φ = 10594092.

The previous prime is 21224353. The next prime is 21224389. The reversal of 21224362 is 26342212.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 7528 + ... + 9955.

It is an arithmetic number, because the mean of its divisors is an integer number (3986352).

Almost surely, 2^21224362 is an apocalyptic number.

21224362 is a deficient number, since it is larger than the sum of its proper divisors (10666454).

21224362 is a wasteful number, since it uses less digits than its factorization.

21224362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18092.

The product of its digits is 1152, while the sum is 22.

The square root of 21224362 is about 4606.9905578371. The cubic root of 21224362 is about 276.8714752578.

Adding to 21224362 its reverse (26342212), we get a palindrome (47566574).

The spelling of 21224362 in words is "twenty-one million, two hundred twenty-four thousand, three hundred sixty-two".