215352317 has 2 divisors, whose sum is σ = 215352318. Its totient is φ = 215352316.

The previous prime is 215352307. The next prime is 215352329. The reversal of 215352317 is 713253512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159491641 + 55860676 = 12629^2 + 7474^2 .

It is a cyclic number.

It is not a de Polignac number, because 215352317 - 2²⁴ = 198575101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215352317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215352307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107676158 + 107676159.

It is an arithmetic number, because the mean of its divisors is an integer number (107676159).

Almost surely, 2^215352317 is an apocalyptic number.

It is an amenable number.

215352317 is a deficient number, since it is larger than the sum of its proper divisors (1).

215352317 is an equidigital number, since it uses as much as digits as its factorization.

215352317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 29.

The square root of 215352317 is about 14674.8872908789. The cubic root of 215352317 is about 599.3996931049.

The spelling of 215352317 in words is "two hundred fifteen million, three hundred fifty-two thousand, three hundred seventeen".