22320055 has 4 divisors (see below), whose sum is σ = 26784072. Its totient is φ = 17856040.

The previous prime is 22320019. The next prime is 22320059. The reversal of 22320055 is 55002322.

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

It is not a de Polignac number, because 22320055 - 2⁹ = 22319543 is a prime.

It is a super-3 number, since 3×22320055³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22320059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2232001 + ... + 2232010.

It is an arithmetic number, because the mean of its divisors is an integer number (6696018).

Almost surely, 2^22320055 is an apocalyptic number.

22320055 is a deficient number, since it is larger than the sum of its proper divisors (4464017).

22320055 is an equidigital number, since it uses as much as digits as its factorization.

22320055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4464016.

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

The square root of 22320055 is about 4724.4105452427. The cubic root of 22320055 is about 281.5561945933.

Adding to 22320055 its reverse (55002322), we get a palindrome (77322377).

The spelling of 22320055 in words is "twenty-two million, three hundred twenty thousand, fifty-five".