52247521 has 4 divisors (see below), whose sum is σ = 52284100. Its totient is φ = 52210944.

The previous prime is 52247491. The next prime is 52247527. The reversal of 52247521 is 12574225.

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 27447121 + 24800400 = 5239^2 + 4980^2 .

It is a cyclic number.

It is not a de Polignac number, because 52247521 - 2²¹ = 50150369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52247521.

It is not an unprimeable number, because it can be changed into a prime (52247527) 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, 16056 + ... + 19033.

It is an arithmetic number, because the mean of its divisors is an integer number (13071025).

Almost surely, 2^52247521 is an apocalyptic number.

It is an amenable number.

52247521 is a deficient number, since it is larger than the sum of its proper divisors (36579).

52247521 is a wasteful number, since it uses less digits than its factorization.

52247521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36578.

The product of its digits is 5600, while the sum is 28.

The square root of 52247521 is about 7228.2446693509. The cubic root of 52247521 is about 373.8424059835.

The spelling of 52247521 in words is "fifty-two million, two hundred forty-seven thousand, five hundred twenty-one".