215213204 has 12 divisors (see below), whose sum is σ = 377651904. Its totient is φ = 107312664.

The previous prime is 215213189. The next prime is 215213213. The reversal of 215213204 is 402312512.

215213204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 71834 + ... + 74769.

It is an arithmetic number, because the mean of its divisors is an integer number (31470992).

Almost surely, 2^215213204 is an apocalyptic number.

It is an amenable number.

215213204 is a deficient number, since it is larger than the sum of its proper divisors (162438700).

215213204 is a wasteful number, since it uses less digits than its factorization.

215213204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146974 (or 146972 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 215213204 is about 14670.1466931998. The cubic root of 215213204 is about 599.2705988344.

Adding to 215213204 its reverse (402312512), we get a palindrome (617525716).

The spelling of 215213204 in words is "two hundred fifteen million, two hundred thirteen thousand, two hundred four".