20222543 has 16 divisors (see below), whose sum is σ = 23383296. Its totient is φ = 17307840.

The previous prime is 20222473. The next prime is 20222557. The reversal of 20222543 is 34522202.

It is not a de Polignac number, because 20222543 - 2⁸ = 20222287 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 (20222243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16355 + ... + 17547.

It is an arithmetic number, because the mean of its divisors is an integer number (1461456).

Almost surely, 2^20222543 is an apocalyptic number.

20222543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20222543 is a deficient number, since it is larger than the sum of its proper divisors (3160753).

20222543 is a wasteful number, since it uses less digits than its factorization.

20222543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294.

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

The square root of 20222543 is about 4496.9481873822. The cubic root of 20222543 is about 272.4448414014. Note that the first 3 decimals are identical.

Adding to 20222543 its reverse (34522202), we get a palindrome (54744745).

The spelling of 20222543 in words is "twenty million, two hundred twenty-two thousand, five hundred forty-three".