52591521 has 8 divisors (see below), whose sum is σ = 70475200. Its totient is φ = 34884432.

The previous prime is 52591507. The next prime is 52591559. The reversal of 52591521 is 12519525.

52591521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 52591521 - 2⁶ = 52591457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52591571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43450 + ... + 44643.

It is an arithmetic number, because the mean of its divisors is an integer number (8809400).

Almost surely, 2^52591521 is an apocalyptic number.

It is an amenable number.

52591521 is a deficient number, since it is larger than the sum of its proper divisors (17883679).

52591521 is a wasteful number, since it uses less digits than its factorization.

52591521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88295.

The product of its digits is 4500, while the sum is 30.

The square root of 52591521 is about 7252.0011720904. The cubic root of 52591521 is about 374.6610768864.

The spelling of 52591521 in words is "fifty-two million, five hundred ninety-one thousand, five hundred twenty-one".