52511321 has 2 divisors, whose sum is σ = 52511322. Its totient is φ = 52511320.

The previous prime is 52511311. The next prime is 52511341. The reversal of 52511321 is 12311525.

It is a happy number.

It is an a-pointer prime, because the next prime (52511341) can be obtained adding 52511321 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29278921 + 23232400 = 5411^2 + 4820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52511321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52511293 and 52511302.

It is not a weakly prime, because it can be changed into another prime (52511311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26255660 + 26255661.

It is an arithmetic number, because the mean of its divisors is an integer number (26255661).

Almost surely, 2^52511321 is an apocalyptic number.

It is an amenable number.

52511321 is a deficient number, since it is larger than the sum of its proper divisors (1).

52511321 is an equidigital number, since it uses as much as digits as its factorization.

52511321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300, while the sum is 20.

The square root of 52511321 is about 7246.4695542036. The cubic root of 52511321 is about 374.4705321962.

Adding to 52511321 its reverse (12311525), we get a palindrome (64822846).

The spelling of 52511321 in words is "fifty-two million, five hundred eleven thousand, three hundred twenty-one".