53300321 has 4 divisors (see below), whose sum is σ = 56435652. Its totient is φ = 50164992.

The previous prime is 53300311. The next prime is 53300323. The reversal of 53300321 is 12300335.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16516096 + 36784225 = 4064^2 + 6065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53300321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 3135313 = 53300321 / (5 + 3 + 3 + 0 + 0 + 3 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53300321.

It is not an unprimeable number, because it can be changed into a prime (53300323) 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, 1567640 + ... + 1567673.

It is an arithmetic number, because the mean of its divisors is an integer number (14108913).

Almost surely, 2^53300321 is an apocalyptic number.

It is an amenable number.

53300321 is a deficient number, since it is larger than the sum of its proper divisors (3135331).

53300321 is a wasteful number, since it uses less digits than its factorization.

53300321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3135330.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 53300321 is about 7300.7068835833. The cubic root of 53300321 is about 376.3367310350.

53300321 divided by its sum of digits (17) gives a palindrome (3135313).

Adding to 53300321 its reverse (12300335), we get a palindrome (65600656).

The spelling of 53300321 in words is "fifty-three million, three hundred thousand, three hundred twenty-one".