22220543 has 4 divisors (see below), whose sum is σ = 22525008. Its totient is φ = 21916080.

The previous prime is 22220537. The next prime is 22220603. The reversal of 22220543 is 34502222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22220543 is a prime.

It is a super-4 number, since 4×22220543⁴ (a number of 30 digits) contains 4444 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 (22220503) 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, 152123 + ... + 152268.

It is an arithmetic number, because the mean of its divisors is an integer number (5631252).

Almost surely, 2^22220543 is an apocalyptic number.

22220543 is a deficient number, since it is larger than the sum of its proper divisors (304465).

22220543 is an equidigital number, since it uses as much as digits as its factorization.

22220543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304464.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 22220543 is about 4713.8670961324. The cubic root of 22220543 is about 281.1371400345.

Adding to 22220543 its reverse (34502222), we get a palindrome (56722765).

The spelling of 22220543 in words is "twenty-two million, two hundred twenty thousand, five hundred forty-three".