22101605 has 8 divisors (see below), whose sum is σ = 27377664. Its totient is φ = 17110800.

The previous prime is 22101571. The next prime is 22101623. The reversal of 22101605 is 50610122.

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

It is not a de Polignac number, because 22101605 - 2⁸ = 22101349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 71141 + ... + 71450.

It is an arithmetic number, because the mean of its divisors is an integer number (3422208).

Almost surely, 2^22101605 is an apocalyptic number.

It is an amenable number.

22101605 is a deficient number, since it is larger than the sum of its proper divisors (5276059).

22101605 is a wasteful number, since it uses less digits than its factorization.

22101605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142627.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 22101605 is about 4701.2344123645. The cubic root of 22101605 is about 280.6346361540.

Adding to 22101605 its reverse (50610122), we get a palindrome (72711727).

The spelling of 22101605 in words is "twenty-two million, one hundred one thousand, six hundred five".