53388521 has 8 divisors (see below), whose sum is σ = 55606464. Its totient is φ = 51211440.

The previous prime is 53388487. The next prime is 53388523. The reversal of 53388521 is 12588335.

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 53388521 - 2⁶ = 53388457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53388523) 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, 7535 + ... + 12788.

It is an arithmetic number, because the mean of its divisors is an integer number (6950808).

Almost surely, 2^53388521 is an apocalyptic number.

It is an amenable number.

53388521 is a deficient number, since it is larger than the sum of its proper divisors (2217943).

53388521 is a wasteful number, since it uses less digits than its factorization.

53388521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20431.

The product of its digits is 28800, while the sum is 35.

The square root of 53388521 is about 7306.7448976956. The cubic root of 53388521 is about 376.5442007521.

The spelling of 53388521 in words is "fifty-three million, three hundred eighty-eight thousand, five hundred twenty-one".