52724281 has 4 divisors (see below), whose sum is σ = 53208100. Its totient is φ = 52240464.

The previous prime is 52724279. The next prime is 52724299. The reversal of 52724281 is 18242725.

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 39879225 + 12845056 = 6315^2 + 3584^2 .

It is a cyclic number.

It is not a de Polignac number, because 52724281 - 2¹ = 52724279 is a prime.

It is a super-2 number, since 2×52724281² = 5559699613933922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52724201) 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, 241746 + ... + 241963.

It is an arithmetic number, because the mean of its divisors is an integer number (13302025).

Almost surely, 2^52724281 is an apocalyptic number.

It is an amenable number.

52724281 is a deficient number, since it is larger than the sum of its proper divisors (483819).

52724281 is a wasteful number, since it uses less digits than its factorization.

52724281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483818.

The product of its digits is 8960, while the sum is 31.

The square root of 52724281 is about 7261.1487383196. The cubic root of 52724281 is about 374.9760719547.

The spelling of 52724281 in words is "fifty-two million, seven hundred twenty-four thousand, two hundred eighty-one".