215297 has 2 divisors, whose sum is σ = 215298. Its totient is φ = 215296.

The previous prime is 215279. The next prime is 215309. The reversal of 215297 is 792512.

It is a Cunningham number, because it is equal to 464²+1.

Together with previous prime (215279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215296 + 1 = 464^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107648 + 107649.

It is an arithmetic number, because the mean of its divisors is an integer number (107649).

2²¹⁵²⁹⁷ is an apocalyptic number.

It is an amenable number.

215297 is a deficient number, since it is larger than the sum of its proper divisors (1).

215297 is an equidigital number, since it uses as much as digits as its factorization.

215297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 26.

The square root of 215297 is about 464.0010775850. The cubic root of 215297 is about 59.9348366620.

It can be divided in two parts, 215 and 297, that added together give a 9-th power (512 = 2⁹).

The spelling of 215297 in words is "two hundred fifteen thousand, two hundred ninety-seven".