22320553 has 4 divisors (see below), whose sum is σ = 22626388. Its totient is φ = 22014720.

The previous prime is 22320503. The next prime is 22320559. The reversal of 22320553 is 35502322.

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 15705369 + 6615184 = 3963^2 + 2572^2 .

It is a cyclic number.

It is not a de Polignac number, because 22320553 - 2¹³ = 22312361 is a prime.

It is a super-3 number, since 3×22320553³ (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 (22320559) 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, 152808 + ... + 152953.

It is an arithmetic number, because the mean of its divisors is an integer number (5656597).

Almost surely, 2^22320553 is an apocalyptic number.

It is an amenable number.

22320553 is a deficient number, since it is larger than the sum of its proper divisors (305835).

22320553 is an equidigital number, since it uses as much as digits as its factorization.

22320553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305834.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 22320553 is about 4724.4632499364. The cubic root of 22320553 is about 281.5582885837.

Adding to 22320553 its reverse (35502322), we get a palindrome (57822875).

The spelling of 22320553 in words is "twenty-two million, three hundred twenty thousand, five hundred fifty-three".