52543521 has 12 divisors (see below), whose sum is σ = 75974548. Its totient is φ = 34992864.

The previous prime is 52543499. The next prime is 52543537. The reversal of 52543521 is 12534525.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17969121 + 34574400 = 4239^2 + 5880^2 .

It is not a de Polignac number, because 52543521 - 2⁵ = 52543489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52543541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8511 + ... + 13323.

Almost surely, 2^52543521 is an apocalyptic number.

It is an amenable number.

52543521 is a deficient number, since it is larger than the sum of its proper divisors (23431027).

52543521 is a wasteful number, since it uses less digits than its factorization.

52543521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6032 (or 6029 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 52543521 is about 7248.6909852745. The cubic root of 52543521 is about 374.5470584709.

The spelling of 52543521 in words is "fifty-two million, five hundred forty-three thousand, five hundred twenty-one".