22013215 has 16 divisors (see below), whose sum is σ = 31966272. Its totient is φ = 14206464.

The previous prime is 22013209. The next prime is 22013221. The reversal of 22013215 is 51231022.

It is an interprime number because it is at equal distance from previous prime (22013209) and next prime (22013221).

It is a cyclic number.

It is not a de Polignac number, because 22013215 - 2⁹ = 22012703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17904 + ... + 19093.

It is an arithmetic number, because the mean of its divisors is an integer number (1997892).

Almost surely, 2^22013215 is an apocalyptic number.

22013215 is a deficient number, since it is larger than the sum of its proper divisors (9953057).

22013215 is a wasteful number, since it uses less digits than its factorization.

22013215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37026.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 22013215 is about 4691.8242720716. The cubic root of 22013215 is about 280.2600263050.

Adding to 22013215 its reverse (51231022), we get a palindrome (73244237).

The spelling of 22013215 in words is "twenty-two million, thirteen thousand, two hundred fifteen".