215240768 has 28 divisors (see below), whose sum is σ = 427687740. Its totient is φ = 107476992.

The previous prime is 215240747. The next prime is 215240801. The reversal of 215240768 is 867042512.

It can be written as a sum of positive squares in 2 ways, for example, as 50580544 + 164660224 = 7112^2 + 12832^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59228 + ... + 62756.

Almost surely, 2^215240768 is an apocalyptic number.

It is an amenable number.

215240768 is a deficient number, since it is larger than the sum of its proper divisors (212446972).

215240768 is an equidigital number, since it uses as much as digits as its factorization.

215240768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4494 (or 4484 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 215240768 is about 14671.0861220293. The cubic root of 215240768 is about 599.2961821309.

The spelling of 215240768 in words is "two hundred fifteen million, two hundred forty thousand, seven hundred sixty-eight".