2543221043 has 4 divisors (see below), whose sum is σ = 2774422968. Its totient is φ = 2312019120.

The previous prime is 2543221039. The next prime is 2543221061. The reversal of 2543221043 is 3401223452.

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 2543221043 - 2² = 2543221039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2543221073) 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, 115600946 + ... + 115600967.

It is an arithmetic number, because the mean of its divisors is an integer number (693605742).

Almost surely, 2^2543221043 is an apocalyptic number.

2543221043 is a deficient number, since it is larger than the sum of its proper divisors (231201925).

2543221043 is a wasteful number, since it uses less digits than its factorization.

2543221043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231201924.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 2543221043 is about 50430.3583469323. The cubic root of 2543221043 is about 1364.9854941724.

Adding to 2543221043 its reverse (3401223452), we get a palindrome (5944444495).

The spelling of 2543221043 in words is "two billion, five hundred forty-three million, two hundred twenty-one thousand, forty-three".