22101665 has 16 divisors (see below), whose sum is σ = 27409536. Its totient is φ = 17097600.

The previous prime is 22101641. The next prime is 22101671. The reversal of 22101665 is 56610122.

It is not a de Polignac number, because 22101665 - 2¹⁰ = 22100641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22101665.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26444 + ... + 27266.

It is an arithmetic number, because the mean of its divisors is an integer number (1713096).

Almost surely, 2^22101665 is an apocalyptic number.

It is an amenable number.

22101665 is a deficient number, since it is larger than the sum of its proper divisors (5307871).

22101665 is a wasteful number, since it uses less digits than its factorization.

22101665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 22101665 is about 4701.2407936629. The cubic root of 22101665 is about 280.6348901034.

Adding to 22101665 its reverse (56610122), we get a palindrome (78711787).

The spelling of 22101665 in words is "twenty-two million, one hundred one thousand, six hundred sixty-five".