215239 has 2 divisors, whose sum is σ = 215240. Its totient is φ = 215238.

The previous prime is 215197. The next prime is 215249. The reversal of 215239 is 932512.

215239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215239 - 2¹⁵ = 182471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107619 + 107620.

It is an arithmetic number, because the mean of its divisors is an integer number (107620).

2²¹⁵²³⁹ is an apocalyptic number.

215239 is a deficient number, since it is larger than the sum of its proper divisors (1).

215239 is an equidigital number, since it uses as much as digits as its factorization.

215239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 22.

The square root of 215239 is about 463.9385735202. The cubic root of 215239 is about 59.9294541242.

It can be divided in two parts, 215 and 239, that added together give a palindrome (454).

The spelling of 215239 in words is "two hundred fifteen thousand, two hundred thirty-nine".