215279 has 2 divisors, whose sum is σ = 215280. Its totient is φ = 215278.

The previous prime is 215273. The next prime is 215297. The reversal of 215279 is 972512.

Together with next prime (215297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215279 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107639 + 107640.

It is an arithmetic number, because the mean of its divisors is an integer number (107640).

2²¹⁵²⁷⁹ is an apocalyptic number.

215279 is a deficient number, since it is larger than the sum of its proper divisors (1).

215279 is an equidigital number, since it uses as much as digits as its factorization.

215279 is an odious number, because the sum of its binary digits is odd.

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

The square root of 215279 is about 463.9816806728. The cubic root of 215279 is about 59.9331663227.

It can be divided in two parts, 215 and 279, that added together give a palindrome (494).

The spelling of 215279 in words is "two hundred fifteen thousand, two hundred seventy-nine".