215830566 has 48 divisors (see below), whose sum is σ = 543218208. Its totient is φ = 60652800.

The previous prime is 215830561. The next prime is 215830567. The reversal of 215830566 is 665038512.

215830566 is a `hidden beast` number, since 2 + 15 + 83 + 0 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 215830566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215830561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6355 + ... + 21726.

It is an arithmetic number, because the mean of its divisors is an integer number (11317046).

Almost surely, 2^215830566 is an apocalyptic number.

215830566 is an abundant number, since it is smaller than the sum of its proper divisors (327387642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215830566 is a wasteful number, since it uses less digits than its factorization.

215830566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28157 (or 28154 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 215830566 is about 14691.1730641226. The cubic root of 215830566 is about 599.8430756281.

The spelling of 215830566 in words is "two hundred fifteen million, eight hundred thirty thousand, five hundred sixty-six".