52117213 has 2 divisors, whose sum is σ = 52117214. Its totient is φ = 52117212.

The previous prime is 52117181. The next prime is 52117253. The reversal of 52117213 is 31271125.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52099524 + 17689 = 7218^2 + 133^2 .

It is a cyclic number.

It is not a de Polignac number, because 52117213 - 2⁵ = 52117181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52117253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26058606 + 26058607.

It is an arithmetic number, because the mean of its divisors is an integer number (26058607).

Almost surely, 2^52117213 is an apocalyptic number.

It is an amenable number.

52117213 is a deficient number, since it is larger than the sum of its proper divisors (1).

52117213 is an equidigital number, since it uses as much as digits as its factorization.

52117213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 22.

The square root of 52117213 is about 7219.2252354390. The cubic root of 52117213 is about 373.5313531944.

Adding to 52117213 its reverse (31271125), we get a palindrome (83388338).

The spelling of 52117213 in words is "fifty-two million, one hundred seventeen thousand, two hundred thirteen".