22321605 has 16 divisors (see below), whose sum is σ = 36146880. Its totient is φ = 11760768.

The previous prime is 22321603. The next prime is 22321667. The reversal of 22321605 is 50612322.

It is not a de Polignac number, because 22321605 - 2¹ = 22321603 is a prime.

It is a super-3 number, since 3×22321605³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22321603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7720 + ... + 10209.

It is an arithmetic number, because the mean of its divisors is an integer number (2259180).

Almost surely, 2^22321605 is an apocalyptic number.

It is an amenable number.

22321605 is a deficient number, since it is larger than the sum of its proper divisors (13825275).

22321605 is a wasteful number, since it uses less digits than its factorization.

22321605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18020.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22321605 is about 4724.5745840234. The cubic root of 22321605 is about 281.5627119309.

Adding to 22321605 its reverse (50612322), we get a palindrome (72933927).

The spelling of 22321605 in words is "twenty-two million, three hundred twenty-one thousand, six hundred five".