52724521 has 8 divisors (see below), whose sum is σ = 55116800. Its totient is φ = 50375520.

The previous prime is 52724513. The next prime is 52724527. The reversal of 52724521 is 12542725.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52724521 - 2³ = 52724513 is a prime.

It is a super-2 number, since 2×52724521² = 5559750229358882, which contains 22 as substring.

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 52724521.

It is not an unprimeable number, because it can be changed into a prime (52724527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8316 + ... + 13213.

It is an arithmetic number, because the mean of its divisors is an integer number (6889600).

Almost surely, 2^52724521 is an apocalyptic number.

It is an amenable number.

52724521 is a deficient number, since it is larger than the sum of its proper divisors (2392279).

52724521 is a wasteful number, since it uses less digits than its factorization.

52724521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21639.

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

The square root of 52724521 is about 7261.1652646115. The cubic root of 52724521 is about 374.9766409153.

The spelling of 52724521 in words is "fifty-two million, seven hundred twenty-four thousand, five hundred twenty-one".