22015116 has 18 divisors (see below), whose sum is σ = 55649412. Its totient is φ = 7338360.

The previous prime is 22015079. The next prime is 22015127. The reversal of 22015116 is 61151022.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 305730 + ... + 305801.

It is an arithmetic number, because the mean of its divisors is an integer number (3091634).

Almost surely, 2^22015116 is an apocalyptic number.

It is an amenable number.

22015116 is an abundant number, since it is smaller than the sum of its proper divisors (33634296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22015116 is a wasteful number, since it uses less digits than its factorization.

22015116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611541 (or 611536 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 22015116 is about 4692.0268541431. The cubic root of 22015116 is about 280.2680935648.

Adding to 22015116 its reverse (61151022), we get a palindrome (83166138).

The spelling of 22015116 in words is "twenty-two million, fifteen thousand, one hundred sixteen".