544135221 has 12 divisors (see below), whose sum is σ = 898255072. Its totient is φ = 310934376.

The previous prime is 544135213. The next prime is 544135247. The reversal of 544135221 is 122531445.

It is not a de Polignac number, because 544135221 - 2³ = 544135213 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 (544135261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4318471 + ... + 4318596.

Almost surely, 2^544135221 is an apocalyptic number.

It is an amenable number.

544135221 is a deficient number, since it is larger than the sum of its proper divisors (354119851).

544135221 is a wasteful number, since it uses less digits than its factorization.

544135221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8637080 (or 8637077 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 544135221 is about 23326.7061755405. The cubic root of 544135221 is about 816.3986527071.

Adding to 544135221 its reverse (122531445), we get a palindrome (666666666).

The spelling of 544135221 in words is "five hundred forty-four million, one hundred thirty-five thousand, two hundred twenty-one".