215820082 has 8 divisors (see below), whose sum is σ = 324353052. Its totient is φ = 107702400.

The previous prime is 215820071. The next prime is 215820097. The reversal of 215820082 is 280028512.

It can be written as a sum of positive squares in 2 ways, for example, as 215766721 + 53361 = 14689^2 + 231^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 215820082.

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, 102519 + ... + 104602.

Almost surely, 2^215820082 is an apocalyptic number.

215820082 is a deficient number, since it is larger than the sum of its proper divisors (108532970).

215820082 is a wasteful number, since it uses less digits than its factorization.

215820082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207644.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 215820082 is about 14690.8162468938. The cubic root of 215820082 is about 599.8333629837.

Adding to 215820082 its reverse (280028512), we get a palindrome (495848594).

The spelling of 215820082 in words is "two hundred fifteen million, eight hundred twenty thousand, eighty-two".