52515217 has 2 divisors, whose sum is σ = 52515218. Its totient is φ = 52515216.

The previous prime is 52515163. The next prime is 52515263. The reversal of 52515217 is 71251525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41165056 + 11350161 = 6416^2 + 3369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52515217 is a prime.

It is not a weakly prime, because it can be changed into another prime (52515277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26257608 + 26257609.

It is an arithmetic number, because the mean of its divisors is an integer number (26257609).

Almost surely, 2^52515217 is an apocalyptic number.

It is an amenable number.

52515217 is a deficient number, since it is larger than the sum of its proper divisors (1).

52515217 is an equidigital number, since it uses as much as digits as its factorization.

52515217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3500, while the sum is 28.

The square root of 52515217 is about 7246.7383697771. The cubic root of 52515217 is about 374.4797930634.

The spelling of 52515217 in words is "fifty-two million, five hundred fifteen thousand, two hundred seventeen".