2543221101 has 32 divisors (see below), whose sum is σ = 3478159360. Its totient is φ = 1652664384.

The previous prime is 2543221099. The next prime is 2543221133. The reversal of 2543221101 is 1011223452.

It is not a de Polignac number, because 2543221101 - 2¹ = 2543221099 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 (2543221141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8986506 + ... + 8986788.

It is an arithmetic number, because the mean of its divisors is an integer number (108692480).

Almost surely, 2^2543221101 is an apocalyptic number.

It is an amenable number.

2543221101 is a deficient number, since it is larger than the sum of its proper divisors (934938259).

2543221101 is a wasteful number, since it uses less digits than its factorization.

2543221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2543221101 is about 50430.3589219827. The cubic root of 2543221101 is about 1364.9855045489.

Adding to 2543221101 its reverse (1011223452), we get a palindrome (3554444553).

The spelling of 2543221101 in words is "two billion, five hundred forty-three million, two hundred twenty-one thousand, one hundred one".