52544021 has 4 divisors (see below), whose sum is σ = 52927692. Its totient is φ = 52160352.

The previous prime is 52544017. The next prime is 52544071. The reversal of 52544021 is 12044525.

It is a happy number.

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 26635921 + 25908100 = 5161^2 + 5090^2 .

It is a cyclic number.

It is not a de Polignac number, because 52544021 - 2² = 52544017 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 (52544071) 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, 191630 + ... + 191903.

It is an arithmetic number, because the mean of its divisors is an integer number (13231923).

Almost surely, 2^52544021 is an apocalyptic number.

It is an amenable number.

52544021 is a deficient number, since it is larger than the sum of its proper divisors (383671).

52544021 is a wasteful number, since it uses less digits than its factorization.

52544021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383670.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 52544021 is about 7248.7254741782. The cubic root of 52544021 is about 374.5482465205.

Adding to 52544021 its reverse (12044525), we get a palindrome (64588546).

The spelling of 52544021 in words is "fifty-two million, five hundred forty-four thousand, twenty-one".