53324521 has 4 divisors (see below), whose sum is σ = 53483092. Its totient is φ = 53165952.

The previous prime is 53324503. The next prime is 53324543. The reversal of 53324521 is 12542335.

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 28772496 + 24552025 = 5364^2 + 4955^2 .

It is a cyclic number.

It is not a de Polignac number, because 53324521 - 2⁹ = 53324009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53324501) 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, 78780 + ... + 79453.

It is an arithmetic number, because the mean of its divisors is an integer number (13370773).

Almost surely, 2^53324521 is an apocalyptic number.

It is an amenable number.

53324521 is a deficient number, since it is larger than the sum of its proper divisors (158571).

53324521 is a wasteful number, since it uses less digits than its factorization.

53324521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158570.

The product of its digits is 3600, while the sum is 25.

The square root of 53324521 is about 7302.3640692587. The cubic root of 53324521 is about 376.3936786025.

Adding to 53324521 its reverse (12542335), we get a palindrome (65866856).

The spelling of 53324521 in words is "fifty-three million, three hundred twenty-four thousand, five hundred twenty-one".