54493821 has 18 divisors (see below), whose sum is σ = 80453022. Its totient is φ = 35543280.

The previous prime is 54493799. The next prime is 54493837. The reversal of 54493821 is 12839445.

54493821 is a `hidden beast` number, since 544 + 93 + 8 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42068196 + 12425625 = 6486^2 + 3525^2 .

It is not a de Polignac number, because 54493821 - 2¹⁰ = 54492797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54491821) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18511 + ... + 21251.

Almost surely, 2^54493821 is an apocalyptic number.

It is an amenable number.

54493821 is a deficient number, since it is larger than the sum of its proper divisors (25959201).

54493821 is a wasteful number, since it uses less digits than its factorization.

54493821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841 (or 2791 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 54493821 is about 7381.9930235676. The cubic root of 54493821 is about 379.1249973503.

The spelling of 54493821 in words is "fifty-four million, four hundred ninety-three thousand, eight hundred twenty-one".