544542421 has 4 divisors (see below), whose sum is σ = 544680000. Its totient is φ = 544404844.

The previous prime is 544542371. The next prime is 544542469. The reversal of 544542421 is 124245445.

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 a cyclic number.

It is not a de Polignac number, because 544542421 - 2¹⁹ = 544018133 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 (544542491) 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, 62671 + ... + 70828.

It is an arithmetic number, because the mean of its divisors is an integer number (136170000).

Almost surely, 2^544542421 is an apocalyptic number.

It is an amenable number.

544542421 is a deficient number, since it is larger than the sum of its proper divisors (137579).

544542421 is a wasteful number, since it uses less digits than its factorization.

544542421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137578.

The product of its digits is 25600, while the sum is 31.

The square root of 544542421 is about 23335.4327365061. The cubic root of 544542421 is about 816.6022507756.

Adding to 544542421 its reverse (124245445), we get a palindrome (668787866).

It can be divided in two parts, 5445424 and 21, that added together give a palindrome (5445445).

The spelling of 544542421 in words is "five hundred forty-four million, five hundred forty-two thousand, four hundred twenty-one".