215319239 has 2 divisors, whose sum is σ = 215319240. Its totient is φ = 215319238.

The previous prime is 215319233. The next prime is 215319241. The reversal of 215319239 is 932913512.

215319239 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 215319239 - 2²⁴ = 198542023 is a prime.

It is a Sophie Germain prime.

Together with 215319241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 215319199 and 215319208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215319233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107659619 + 107659620.

It is an arithmetic number, because the mean of its divisors is an integer number (107659620).

Almost surely, 2^215319239 is an apocalyptic number.

215319239 is a deficient number, since it is larger than the sum of its proper divisors (1).

215319239 is an equidigital number, since it uses as much as digits as its factorization.

215319239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 35.

The square root of 215319239 is about 14673.7602202026. The cubic root of 215319239 is about 599.3690023767.

The spelling of 215319239 in words is "two hundred fifteen million, three hundred nineteen thousand, two hundred thirty-nine".