2221543 has 6 divisors (see below), whose sum is σ = 2360216. Its totient is φ = 2090592.

The previous prime is 2221523. The next prime is 2221567. The reversal of 2221543 is 3451222.

It is not a de Polignac number, because 2221543 - 2⁵ = 2221511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3555 + ... + 4132.

2^2221543 is an apocalyptic number.

2221543 is a deficient number, since it is larger than the sum of its proper divisors (138673).

2221543 is an equidigital number, since it uses as much as digits as its factorization.

2221543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7721 (or 7704 counting only the distinct ones).

The product of its digits is 480, while the sum is 19.

The square root of 2221543 is about 1490.4841495299. The cubic root of 2221543 is about 130.4822913587.

Adding to 2221543 its reverse (3451222), we get a palindrome (5672765).

The spelling of 2221543 in words is "two million, two hundred twenty-one thousand, five hundred forty-three".