22221635 has 8 divisors (see below), whose sum is σ = 28234656. Its totient is φ = 16731520.

The previous prime is 22221599. The next prime is 22221649. The reversal of 22221635 is 53612222.

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

It is not a de Polignac number, because 22221635 - 2¹⁸ = 21959491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22221635.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130631 + ... + 130800.

It is an arithmetic number, because the mean of its divisors is an integer number (3529332).

Almost surely, 2^22221635 is an apocalyptic number.

22221635 is a deficient number, since it is larger than the sum of its proper divisors (6013021).

22221635 is a wasteful number, since it uses less digits than its factorization.

22221635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261453.

The product of its digits is 1440, while the sum is 23.

The square root of 22221635 is about 4713.9829231765. The cubic root of 22221635 is about 281.1417453334.

Adding to 22221635 its reverse (53612222), we get a palindrome (75833857).

The spelling of 22221635 in words is "twenty-two million, two hundred twenty-one thousand, six hundred thirty-five".