54249521 has 4 divisors (see below), whose sum is σ = 54275700. Its totient is φ = 54223344.

The previous prime is 54249509. The next prime is 54249523. The reversal of 54249521 is 12594245.

54249521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2768896 + 51480625 = 1664^2 + 7175^2 .

It is a cyclic number.

It is not a de Polignac number, because 54249521 - 2²² = 50055217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54249523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9686 + ... + 14223.

It is an arithmetic number, because the mean of its divisors is an integer number (13568925).

Almost surely, 2^54249521 is an apocalyptic number.

It is an amenable number.

54249521 is a deficient number, since it is larger than the sum of its proper divisors (26179).

54249521 is a wasteful number, since it uses less digits than its factorization.

54249521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26178.

The product of its digits is 14400, while the sum is 32.

The square root of 54249521 is about 7365.4274146176. The cubic root of 54249521 is about 378.5575997457.

The spelling of 54249521 in words is "fifty-four million, two hundred forty-nine thousand, five hundred twenty-one".