53305320 has 64 divisors (see below), whose sum is σ = 162648000. Its totient is φ = 13971968.

The previous prime is 53305313. The next prime is 53305321. The reversal of 53305320 is 2350335.

It is not an unprimeable number, because it can be changed into a prime (53305321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3316 + ... + 10844.

It is an arithmetic number, because the mean of its divisors is an integer number (2541375).

Almost surely, 2^53305320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53305320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81324000).

53305320 is an abundant number, since it is smaller than the sum of its proper divisors (109342680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53305320 is a wasteful number, since it uses less digits than its factorization.

53305320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7602 (or 7598 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 21.

The square root of 53305320 is about 7301.0492396641. The cubic root of 53305320 is about 376.3484961205.

Adding to 53305320 its reverse (2350335), we get a palindrome (55655655).

The spelling of 53305320 in words is "fifty-three million, three hundred five thousand, three hundred twenty".