204215193 has 72 divisors (see below), whose sum is σ = 373464000. Its totient is φ = 106577856.

The previous prime is 204215189. The next prime is 204215227. The reversal of 204215193 is 391512402.

It is not a de Polignac number, because 204215193 - 2² = 204215189 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204215393) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1026108 + ... + 1026306.

It is an arithmetic number, because the mean of its divisors is an integer number (5187000).

Almost surely, 2^204215193 is an apocalyptic number.

It is an amenable number.

204215193 is a deficient number, since it is larger than the sum of its proper divisors (169248807).

204215193 is a wasteful number, since it uses less digits than its factorization.

204215193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 204215193 is about 14290.3881332874. The cubic root of 204215193 is about 588.8834508905.

Adding to 204215193 its reverse (391512402), we get a palindrome (595727595).

The spelling of 204215193 in words is "two hundred four million, two hundred fifteen thousand, one hundred ninety-three".