544153111214221 has 4 divisors (see below), whose sum is σ = 576162117756252. Its totient is φ = 512144104672192.

The previous prime is 544153111214179. The next prime is 544153111214261. The reversal of 544153111214221 is 122412111351445.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 195005724158025 + 349147387056196 = 13964445^2 + 18685486^2 .

It is a cyclic number.

It is not a de Polignac number, because 544153111214221 - 2⁴¹ = 541954087958669 is a prime.

It is a super-2 number, since 2×544153111214221² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544153111214261) 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, 16004503270990 + ... + 16004503271023.

It is an arithmetic number, because the mean of its divisors is an integer number (144040529439063).

Almost surely, 2^{544153111214221} is an apocalyptic number.

It is an amenable number.

544153111214221 is a deficient number, since it is larger than the sum of its proper divisors (32009006542031).

544153111214221 is a wasteful number, since it uses less digits than its factorization.

544153111214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32009006542030.

The product of its digits is 38400, while the sum is 37.

Adding to 544153111214221 its reverse (122412111351445), we get a palindrome (666565222565666).

The spelling of 544153111214221 in words is "five hundred forty-four trillion, one hundred fifty-three billion, one hundred eleven million, two hundred fourteen thousand, two hundred twenty-one".