221250540543 has 16 divisors (see below), whose sum is σ = 320795699040. Its totient is φ = 135071870976.

The previous prime is 221250540521. The next prime is 221250540619. The reversal of 221250540543 is 345045052122.

It is a happy number.

It is not a de Polignac number, because 221250540543 - 2¹⁰ = 221250539519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221250540503) 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, 58623058 + ... + 58626831.

It is an arithmetic number, because the mean of its divisors is an integer number (20049731190).

Almost surely, 2^221250540543 is an apocalyptic number.

221250540543 is a deficient number, since it is larger than the sum of its proper divisors (99545158497).

221250540543 is a wasteful number, since it uses less digits than its factorization.

221250540543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117249946.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 221250540543 its reverse (345045052122), we get a palindrome (566295592665).

The spelling of 221250540543 in words is "two hundred twenty-one billion, two hundred fifty million, five hundred forty thousand, five hundred forty-three".