53315321 has 4 divisors (see below), whose sum is σ = 53787252. Its totient is φ = 52843392.

The previous prime is 53315309. The next prime is 53315347. The reversal of 53315321 is 12351335.

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 9610000 + 43705321 = 3100^2 + 6611^2 .

It is a cyclic number.

It is not a de Polignac number, because 53315321 - 2¹⁴ = 53298937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53315351) 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, 235796 + ... + 236021.

It is an arithmetic number, because the mean of its divisors is an integer number (13446813).

Almost surely, 2^53315321 is an apocalyptic number.

It is an amenable number.

53315321 is a deficient number, since it is larger than the sum of its proper divisors (471931).

53315321 is a wasteful number, since it uses less digits than its factorization.

53315321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471930.

The product of its digits is 1350, while the sum is 23.

The square root of 53315321 is about 7301.7341091004. The cubic root of 53315321 is about 376.3720311444.

Adding to 53315321 its reverse (12351335), we get a palindrome (65666656).

The spelling of 53315321 in words is "fifty-three million, three hundred fifteen thousand, three hundred twenty-one".