54533021 has 12 divisors (see below), whose sum is σ = 59550300. Its totient is φ = 49871808.

The previous prime is 54532981. The next prime is 54533033. The reversal of 54533021 is 12033545.

It can be written as a sum of positive squares in 2 ways, for example, as 44222500 + 10310521 = 6650^2 + 3211^2 .

It is not a de Polignac number, because 54533021 - 2¹⁸ = 54270877 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 (54533071) 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, 7865 + ... + 13073.

It is an arithmetic number, because the mean of its divisors is an integer number (4962525).

Almost surely, 2^54533021 is an apocalyptic number.

It is an amenable number.

54533021 is a deficient number, since it is larger than the sum of its proper divisors (5017279).

54533021 is a wasteful number, since it uses less digits than its factorization.

54533021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5276 (or 5257 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 54533021 is about 7384.6476557788. The cubic root of 54533021 is about 379.2158831148.

Adding to 54533021 its reverse (12033545), we get a palindrome (66566566).

The spelling of 54533021 in words is "fifty-four million, five hundred thirty-three thousand, twenty-one".