54005521 has 2 divisors, whose sum is σ = 54005522. Its totient is φ = 54005520.

The previous prime is 54005519. The next prime is 54005563. The reversal of 54005521 is 12550045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45711121 + 8294400 = 6761^2 + 2880^2 .

It is a cyclic number.

It is not a de Polignac number, because 54005521 - 2¹ = 54005519 is a prime.

Together with 54005519, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 54005492 and 54005501.

It is not a weakly prime, because it can be changed into another prime (54005321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27002760 + 27002761.

It is an arithmetic number, because the mean of its divisors is an integer number (27002761).

Almost surely, 2^54005521 is an apocalyptic number.

It is an amenable number.

54005521 is a deficient number, since it is larger than the sum of its proper divisors (1).

54005521 is an equidigital number, since it uses as much as digits as its factorization.

54005521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 54005521 is about 7348.8448752168. The cubic root of 54005521 is about 377.9891960556.

Adding to 54005521 its reverse (12550045), we get a palindrome (66555566).

The spelling of 54005521 in words is "fifty-four million, five thousand, five hundred twenty-one".