52535521 has 4 divisors (see below), whose sum is σ = 52632112. Its totient is φ = 52438932.

The previous prime is 52535507. The next prime is 52535533. The reversal of 52535521 is 12553525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52535521 - 2⁷ = 52535393 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 52535521.

It is not an unprimeable number, because it can be changed into a prime (52535921) 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, 47475 + ... + 48568.

It is an arithmetic number, because the mean of its divisors is an integer number (13158028).

Almost surely, 2^52535521 is an apocalyptic number.

It is an amenable number.

52535521 is a deficient number, since it is larger than the sum of its proper divisors (96591).

52535521 is an equidigital number, since it uses as much as digits as its factorization.

52535521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96590.

The product of its digits is 7500, while the sum is 28.

The square root of 52535521 is about 7248.1391404967. The cubic root of 52535521 is about 374.5280486513.

It can be divided in two parts, 525 and 35521, that added together give a triangular number (36046 = T₂₆₈).

The spelling of 52535521 in words is "fifty-two million, five hundred thirty-five thousand, five hundred twenty-one".