53121360 has 80 divisors (see below), whose sum is σ = 165614400. Its totient is φ = 14085120.

The previous prime is 53121353. The next prime is 53121361. The reversal of 53121360 is 6312135.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53121361) 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, 50116 + ... + 51164.

It is an arithmetic number, because the mean of its divisors is an integer number (2070180).

Almost surely, 2^53121360 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 53121360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82807200).

53121360 is an abundant number, since it is smaller than the sum of its proper divisors (112493040).

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

53121360 is a wasteful number, since it uses less digits than its factorization.

53121360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276 (or 1270 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 53121360 is about 7288.4401623393. The cubic root of 53121360 is about 375.9150630538.

Adding to 53121360 its reverse (6312135), we get a palindrome (59433495).

The spelling of 53121360 in words is "fifty-three million, one hundred twenty-one thousand, three hundred sixty".