53328021 has 8 divisors (see below), whose sum is σ = 71145120. Its totient is φ = 35531472.

The previous prime is 53327987. The next prime is 53328043. The reversal of 53328021 is 12082335.

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

It is not a de Polignac number, because 53328021 - 2⁷ = 53327893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53327982 and 53328000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53328521) 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, 2575 + ... + 10643.

It is an arithmetic number, because the mean of its divisors is an integer number (8893140).

Almost surely, 2^53328021 is an apocalyptic number.

It is an amenable number.

53328021 is a deficient number, since it is larger than the sum of its proper divisors (17817099).

53328021 is a wasteful number, since it uses less digits than its factorization.

53328021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10275.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 53328021 is about 7302.6037137448. The cubic root of 53328021 is about 376.4019133948.

The spelling of 53328021 in words is "fifty-three million, three hundred twenty-eight thousand, twenty-one".