215530798 has 16 divisors (see below), whose sum is σ = 369930240. Its totient is φ = 92258136.

The previous prime is 215530781. The next prime is 215530801. The reversal of 215530798 is 897035512.

It is a self number, because there is not a number n which added to its sum of digits gives 215530798.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3163 + ... + 21001.

It is an arithmetic number, because the mean of its divisors is an integer number (23120640).

Almost surely, 2^215530798 is an apocalyptic number.

215530798 is a deficient number, since it is larger than the sum of its proper divisors (154399442).

215530798 is a wasteful number, since it uses less digits than its factorization.

215530798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18711.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 215530798 is about 14680.9672024700. The cubic root of 215530798 is about 599.5652387509.

The spelling of 215530798 in words is "two hundred fifteen million, five hundred thirty thousand, seven hundred ninety-eight".