53121233 has 16 divisors (see below), whose sum is σ = 60804864. Its totient is φ = 45970560.

The previous prime is 53121227. The next prime is 53121251. The reversal of 53121233 is 33212135.

It is a cyclic number.

It is not a de Polignac number, because 53121233 - 2⁴ = 53121217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53121203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17741 + ... + 20517.

It is an arithmetic number, because the mean of its divisors is an integer number (3800304).

Almost surely, 2^53121233 is an apocalyptic number.

It is an amenable number.

53121233 is a deficient number, since it is larger than the sum of its proper divisors (7683631).

53121233 is a wasteful number, since it uses less digits than its factorization.

53121233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872.

The product of its digits is 540, while the sum is 20.

The square root of 53121233 is about 7288.4314499074. The cubic root of 53121233 is about 375.9147634804.

Adding to 53121233 its reverse (33212135), we get a palindrome (86333368).

The spelling of 53121233 in words is "fifty-three million, one hundred twenty-one thousand, two hundred thirty-three".