53390521 has 8 divisors (see below), whose sum is σ = 56476800. Its totient is φ = 50368032.

The previous prime is 53390507. The next prime is 53390527. The reversal of 53390521 is 12509335.

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 53390521 - 2⁹ = 53390009 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 53390521.

It is not an unprimeable number, because it can be changed into a prime (53390527) 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, 14221 + ... + 17578.

It is an arithmetic number, because the mean of its divisors is an integer number (7059600).

Almost surely, 2^53390521 is an apocalyptic number.

It is an amenable number.

53390521 is a deficient number, since it is larger than the sum of its proper divisors (3086279).

53390521 is a wasteful number, since it uses less digits than its factorization.

53390521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31895.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 53390521 is about 7306.8817562624. The cubic root of 53390521 is about 376.5489026305.

Adding to 53390521 its reverse (12509335), we get a palindrome (65899856).

The spelling of 53390521 in words is "fifty-three million, three hundred ninety thousand, five hundred twenty-one".