54532021 has 4 divisors (see below), whose sum is σ = 55072044. Its totient is φ = 53992000.

The previous prime is 54532003. The next prime is 54532081. The reversal of 54532021 is 12023545.

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 36469521 + 18062500 = 6039^2 + 4250^2 .

It is a cyclic number.

It is not a de Polignac number, because 54532021 - 2²¹ = 52434869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54531983 and 54532001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54532001) 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, 269860 + ... + 270061.

It is an arithmetic number, because the mean of its divisors is an integer number (13768011).

Almost surely, 2^54532021 is an apocalyptic number.

It is an amenable number.

54532021 is a deficient number, since it is larger than the sum of its proper divisors (540023).

54532021 is a wasteful number, since it uses less digits than its factorization.

54532021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540022.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 54532021 is about 7384.5799474310. The cubic root of 54532021 is about 379.2135651418.

Adding to 54532021 its reverse (12023545), we get a palindrome (66555566).

The spelling of 54532021 in words is "fifty-four million, five hundred thirty-two thousand, twenty-one".