22215 has 8 divisors (see below), whose sum is σ = 35568. Its totient is φ = 11840.

The previous prime is 22193. The next prime is 22229. The reversal of 22215 is 51222.

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

It is not a de Polignac number, because 22215 - 2¹⁰ = 21191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726 + ... + 755.

It is an arithmetic number, because the mean of its divisors is an integer number (4446).

2²²²¹⁵ is an apocalyptic number.

22215 is a deficient number, since it is larger than the sum of its proper divisors (13353).

22215 is a wasteful number, since it uses less digits than its factorization.

22215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489.

The product of its digits is 40, while the sum is 12.

The square root of 22215 is about 149.0469724617. The cubic root of 22215 is about 28.1113761176. Note that the first 3 decimals are identical.

Adding to 22215 its reverse (51222), we get a palindrome (73437).

The spelling of 22215 in words is "twenty-two thousand, two hundred fifteen".