544205347221 has 4 divisors (see below), whose sum is σ = 725607129632. Its totient is φ = 362803564812.

The previous prime is 544205347181. The next prime is 544205347249. The reversal of 544205347221 is 122743502445.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 544205347221 - 2⁶ = 544205347157 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 544205347221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544205347321) 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, 90700891201 + ... + 90700891206.

It is an arithmetic number, because the mean of its divisors is an integer number (181401782408).

Almost surely, 2^544205347221 is an apocalyptic number.

It is an amenable number.

544205347221 is a deficient number, since it is larger than the sum of its proper divisors (181401782411).

544205347221 is a wasteful number, since it uses less digits than its factorization.

544205347221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181401782410.

The product of its (nonzero) digits is 268800, while the sum is 39.

Adding to 544205347221 its reverse (122743502445), we get a palindrome (666948849666).

The spelling of 544205347221 in words is "five hundred forty-four billion, two hundred five million, three hundred forty-seven thousand, two hundred twenty-one".