215220255 has 16 divisors (see below), whose sum is σ = 364608864. Its totient is φ = 108032000.

The previous prime is 215220167. The next prime is 215220307. The reversal of 215220255 is 552022512.

It is not a de Polignac number, because 215220255 - 2⁷ = 215220127 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421746 + ... + 422255.

It is an arithmetic number, because the mean of its divisors is an integer number (22788054).

Almost surely, 2^215220255 is an apocalyptic number.

215220255 is a deficient number, since it is larger than the sum of its proper divisors (149388609).

215220255 is a wasteful number, since it uses less digits than its factorization.

215220255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844026.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 215220255 is about 14670.3870092101. The cubic root of 215220255 is about 599.2771433691.

Adding to 215220255 its reverse (552022512), we get a palindrome (767242767).

The spelling of 215220255 in words is "two hundred fifteen million, two hundred twenty thousand, two hundred fifty-five".