215678159 has 8 divisors (see below), whose sum is σ = 223557888. Its totient is φ = 207935640.

The previous prime is 215678149. The next prime is 215678171. The reversal of 215678159 is 951876512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215678159 - 2¹⁶ = 215612623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215678119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31097 + ... + 37394.

It is an arithmetic number, because the mean of its divisors is an integer number (27944736).

Almost surely, 2^215678159 is an apocalyptic number.

215678159 is a deficient number, since it is larger than the sum of its proper divisors (7879729).

215678159 is an equidigital number, since it uses as much as digits as its factorization.

215678159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68605.

The product of its digits is 151200, while the sum is 44.

The square root of 215678159 is about 14685.9851218773. The cubic root of 215678159 is about 599.7018509438.

The spelling of 215678159 in words is "two hundred fifteen million, six hundred seventy-eight thousand, one hundred fifty-nine".