215213205 has 16 divisors (see below), whose sum is σ = 356215680. Its totient is φ = 110822208.

The previous prime is 215213189. The next prime is 215213213. The reversal of 215213205 is 502312512.

It is not a de Polignac number, because 215213205 - 2⁴ = 215213189 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246937 + ... + 247806.

It is an arithmetic number, because the mean of its divisors is an integer number (22263480).

Almost surely, 2^215213205 is an apocalyptic number.

It is an amenable number.

215213205 is a deficient number, since it is larger than the sum of its proper divisors (141002475).

215213205 is a wasteful number, since it uses less digits than its factorization.

215213205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494780.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 215213205 is about 14670.1467272826. The cubic root of 215213205 is about 599.2705997626.

Adding to 215213205 its reverse (502312512), we get a palindrome (717525717).

The spelling of 215213205 in words is "two hundred fifteen million, two hundred thirteen thousand, two hundred five".