22213215 has 12 divisors (see below), whose sum is σ = 38502984. Its totient is φ = 11847024.

The previous prime is 22213183. The next prime is 22213259. The reversal of 22213215 is 51231222.

It is not a de Polignac number, because 22213215 - 2⁵ = 22213183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246769 + ... + 246858.

It is an arithmetic number, because the mean of its divisors is an integer number (3208582).

Almost surely, 2^22213215 is an apocalyptic number.

22213215 is a deficient number, since it is larger than the sum of its proper divisors (16289769).

22213215 is a wasteful number, since it uses less digits than its factorization.

22213215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493638 (or 493635 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 22213215 is about 4713.0897508959. The cubic root of 22213215 is about 281.1062317068.

Adding to 22213215 its reverse (51231222), we get a palindrome (73444437).

The spelling of 22213215 in words is "twenty-two million, two hundred thirteen thousand, two hundred fifteen".