22216538 has 8 divisors (see below), whose sum is σ = 33746880. Its totient is φ = 10967580.

The previous prime is 22216531. The next prime is 22216541. The reversal of 22216538 is 83561222.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22216538.

It is not an unprimeable number, because it can be changed into a prime (22216531) 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, 70148 + ... + 70463.

It is an arithmetic number, because the mean of its divisors is an integer number (4218360).

Almost surely, 2^22216538 is an apocalyptic number.

22216538 is a deficient number, since it is larger than the sum of its proper divisors (11530342).

22216538 is a wasteful number, since it uses less digits than its factorization.

22216538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140692.

The product of its digits is 5760, while the sum is 29.

The square root of 22216538 is about 4713.4422665394. The cubic root of 22216538 is about 281.1202484296.

The spelling of 22216538 in words is "twenty-two million, two hundred sixteen thousand, five hundred thirty-eight".