215005255 has 4 divisors (see below), whose sum is σ = 258006312. Its totient is φ = 172004200.

The previous prime is 215005249. The next prime is 215005267. The reversal of 215005255 is 552500512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 215005255 - 2⁵ = 215005223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21500521 + ... + 21500530.

It is an arithmetic number, because the mean of its divisors is an integer number (64501578).

Almost surely, 2^215005255 is an apocalyptic number.

215005255 is a deficient number, since it is larger than the sum of its proper divisors (43001057).

215005255 is an equidigital number, since it uses as much as digits as its factorization.

215005255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43001056.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 215005255 is about 14663.0574915329. The cubic root of 215005255 is about 599.0775222664.

Adding to 215005255 its reverse (552500512), we get a palindrome (767505767).

The spelling of 215005255 in words is "two hundred fifteen million, five thousand, two hundred fifty-five".