22730143 has 4 divisors (see below), whose sum is σ = 22950928. Its totient is φ = 22509360.

The previous prime is 22730119. The next prime is 22730159. The reversal of 22730143 is 34103722.

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 22730143 - 2⁹ = 22729631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22731143) 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, 110238 + ... + 110443.

It is an arithmetic number, because the mean of its divisors is an integer number (5737732).

Almost surely, 2^22730143 is an apocalyptic number.

22730143 is a deficient number, since it is larger than the sum of its proper divisors (220785).

22730143 is a wasteful number, since it uses less digits than its factorization.

22730143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220784.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 22730143 is about 4767.6139734672. The cubic root of 22730143 is about 283.2700913829.

Adding to 22730143 its reverse (34103722), we get a palindrome (56833865).

The spelling of 22730143 in words is "twenty-two million, seven hundred thirty thousand, one hundred forty-three".