22115605 has 8 divisors (see below), whose sum is σ = 27186264. Its totient is φ = 17260800.

The previous prime is 22115593. The next prime is 22115609. The reversal of 22115605 is 50651122.

22115605 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 4 ways, for example, as 194481 + 21921124 = 441^2 + 4682^2 .

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

It is not a de Polignac number, because 22115605 - 2⁵ = 22115573 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 (22115609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53736 + ... + 54145.

It is an arithmetic number, because the mean of its divisors is an integer number (3398283).

Almost surely, 2^22115605 is an apocalyptic number.

It is an amenable number.

22115605 is a deficient number, since it is larger than the sum of its proper divisors (5070659).

22115605 is a wasteful number, since it uses less digits than its factorization.

22115605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107927.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 22115605 is about 4702.7231472839. The cubic root of 22115605 is about 280.6938785428.

Adding to 22115605 its reverse (50651122), we get a palindrome (72766727).

The spelling of 22115605 in words is "twenty-two million, one hundred fifteen thousand, six hundred five".