22015 has 16 divisors (see below), whose sum is σ = 32832. Its totient is φ = 13824.

The previous prime is 22013. The next prime is 22027. The reversal of 22015 is 51022.

It is a 9-Lehmer number, since φ(22015) divides (22015-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 22015 - 2¹ = 22013 is a prime.

It is a Duffinian number.

It is a plaindrome in base 4 and base 16.

It is a zygodrome in base 4 and base 16.

It is a junction number, because it is equal to n+sod(n) for n = 21992 and 22010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577 + ... + 613.

It is an arithmetic number, because the mean of its divisors is an integer number (2052).

2²²⁰¹⁵ is an apocalyptic number.

22015 is a deficient number, since it is larger than the sum of its proper divisors (10817).

22015 is a wasteful number, since it uses less digits than its factorization.

22015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 22015 is about 148.3745261155. The cubic root of 22015 is about 28.0267601310.

Adding to 22015 its reverse (51022), we get a palindrome (73037).

The spelling of 22015 in words is "twenty-two thousand, fifteen".