22187983 has 4 divisors (see below), whose sum is σ = 22407768. Its totient is φ = 21968200.

The previous prime is 22187981. The next prime is 22187989. The reversal of 22187983 is 38978122.

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

It is a cyclic number.

It is not a de Polignac number, because 22187983 - 2¹ = 22187981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22187981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109741 + ... + 109942.

It is an arithmetic number, because the mean of its divisors is an integer number (5601942).

Almost surely, 2^22187983 is an apocalyptic number.

22187983 is a deficient number, since it is larger than the sum of its proper divisors (219785).

22187983 is a wasteful number, since it uses less digits than its factorization.

22187983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219784.

The product of its digits is 48384, while the sum is 40.

The square root of 22187983 is about 4710.4121900318. The cubic root of 22187983 is about 280.9997551532. Note that the first 3 decimals are identical.

It can be divided in two parts, 2218 and 7983, that added together give a palindrome (10201).

The spelling of 22187983 in words is "twenty-two million, one hundred eighty-seven thousand, nine hundred eighty-three".