22107865 has 8 divisors (see below), whose sum is σ = 28570248. Its totient is φ = 16325760.

The previous prime is 22107863. The next prime is 22107901. The reversal of 22107865 is 56870122.

It can be written as a sum of positive squares in 4 ways, for example, as 3583449 + 18524416 = 1893^2 + 4304^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22107865 - 2¹ = 22107863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22107863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169996 + ... + 170125.

It is an arithmetic number, because the mean of its divisors is an integer number (3571281).

Almost surely, 2^22107865 is an apocalyptic number.

It is an amenable number.

22107865 is a deficient number, since it is larger than the sum of its proper divisors (6462383).

22107865 is a wasteful number, since it uses less digits than its factorization.

22107865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340139.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 22107865 is about 4701.9001478126. The cubic root of 22107865 is about 280.6611290564.

Adding to 22107865 its reverse (56870122), we get a palindrome (78977987).

The spelling of 22107865 in words is "twenty-two million, one hundred seven thousand, eight hundred sixty-five".