22320143 has 4 divisors (see below), whose sum is σ = 23290608. Its totient is φ = 21349680.

The previous prime is 22320131. The next prime is 22320187. The reversal of 22320143 is 34102322.

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

It is a cyclic number.

It is not a de Polignac number, because 22320143 - 2⁴ = 22320127 is a prime.

It is a super-3 number, since 3×22320143³ (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 (22320743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485198 + ... + 485243.

It is an arithmetic number, because the mean of its divisors is an integer number (5822652).

Almost surely, 2^22320143 is an apocalyptic number.

22320143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

22320143 is a deficient number, since it is larger than the sum of its proper divisors (970465).

22320143 is an equidigital number, since it uses as much as digits as its factorization.

22320143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970464.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 22320143 is about 4724.4198585646. The cubic root of 22320143 is about 281.5565646180.

Adding to 22320143 its reverse (34102322), we get a palindrome (56422465).

The spelling of 22320143 in words is "twenty-two million, three hundred twenty thousand, one hundred forty-three".