53628321 has 4 divisors (see below), whose sum is σ = 71504432. Its totient is φ = 35752212.

The previous prime is 53628307. The next prime is 53628329. The reversal of 53628321 is 12382635.

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 not a de Polignac number, because 53628321 - 2⁶ = 53628257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53628329) 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, 8938051 + ... + 8938056.

It is an arithmetic number, because the mean of its divisors is an integer number (17876108).

Almost surely, 2^53628321 is an apocalyptic number.

It is an amenable number.

53628321 is a deficient number, since it is larger than the sum of its proper divisors (17876111).

53628321 is a wasteful number, since it uses less digits than its factorization.

53628321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17876110.

The product of its digits is 8640, while the sum is 30.

The square root of 53628321 is about 7323.1360085690. The cubic root of 53628321 is about 377.1071210441.

The spelling of 53628321 in words is "fifty-three million, six hundred twenty-eight thousand, three hundred twenty-one".