22016506 has 4 divisors (see below), whose sum is σ = 33024762. Its totient is φ = 11008252.

The previous prime is 22016471. The next prime is 22016507. The reversal of 22016506 is 60561022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22005481 + 11025 = 4691^2 + 105^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (22016507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5504125 + ... + 5504128.

Almost surely, 2^22016506 is an apocalyptic number.

22016506 is a deficient number, since it is larger than the sum of its proper divisors (11008256).

22016506 is a wasteful number, since it uses less digits than its factorization.

22016506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11008255.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 22016506 is about 4692.1749754245. The cubic root of 22016506 is about 280.2739920037.

Adding to 22016506 its reverse (60561022), we get a palindrome (82577528).

It can be divided in two parts, 22016 and 506, that added together give a palindrome (22522).

The spelling of 22016506 in words is "twenty-two million, sixteen thousand, five hundred six".