53121303 has 6 divisors (see below), whose sum is σ = 76730784. Its totient is φ = 35414196.

The previous prime is 53121251. The next prime is 53121319. The reversal of 53121303 is 30312135.

53121303 is a `hidden beast` number, since 531 + 2 + 130 + 3 = 666.

It is not a de Polignac number, because 53121303 - 2¹⁶ = 53055767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53121353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2951175 + ... + 2951192.

It is an arithmetic number, because the mean of its divisors is an integer number (12788464).

Almost surely, 2^53121303 is an apocalyptic number.

53121303 is a deficient number, since it is larger than the sum of its proper divisors (23609481).

53121303 is a wasteful number, since it uses less digits than its factorization.

53121303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5902373 (or 5902370 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 53121303 is about 7288.4362520365. The cubic root of 53121303 is about 375.9149285997.

Adding to 53121303 its reverse (30312135), we get a palindrome (83433438).

The spelling of 53121303 in words is "fifty-three million, one hundred twenty-one thousand, three hundred three".