22320505 has 4 divisors (see below), whose sum is σ = 26784612. Its totient is φ = 17856400.

The previous prime is 22320503. The next prime is 22320559. The reversal of 22320505 is 50502322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15335056 + 6985449 = 3916^2 + 2643^2 .

It is not a de Polignac number, because 22320505 - 2¹ = 22320503 is a prime.

It is a super-3 number, since 3×22320505³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22320503) 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 3 ways as a sum of consecutive naturals, for example, 2232046 + ... + 2232055.

It is an arithmetic number, because the mean of its divisors is an integer number (6696153).

Almost surely, 2^22320505 is an apocalyptic number.

It is an amenable number.

22320505 is a deficient number, since it is larger than the sum of its proper divisors (4464107).

22320505 is an equidigital number, since it uses as much as digits as its factorization.

22320505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464106.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 22320505 is about 4724.4581699916. The cubic root of 22320505 is about 281.5580867547.

Adding to 22320505 its reverse (50502322), we get a palindrome (72822827).

The spelling of 22320505 in words is "twenty-two million, three hundred twenty thousand, five hundred five".