52993521 has 20 divisors (see below), whose sum is σ = 90473152. Its totient is φ = 30281688.

The previous prime is 52993519. The next prime is 52993531. The reversal of 52993521 is 12539925.

It is a happy number.

It is not a de Polignac number, because 52993521 - 2¹ = 52993519 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52993531) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 46165 + ... + 47298.

Almost surely, 2^52993521 is an apocalyptic number.

It is an amenable number.

52993521 is a deficient number, since it is larger than the sum of its proper divisors (37479631).

52993521 is an equidigital number, since it uses as much as digits as its factorization.

52993521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93482 (or 93473 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 52993521 is about 7279.6648961336. The cubic root of 52993521 is about 375.6132685245.

The spelling of 52993521 in words is "fifty-two million, nine hundred ninety-three thousand, five hundred twenty-one".