213173198 has 16 divisors (see below), whose sum is σ = 384673920. Its totient is φ = 86551416.

The previous prime is 213173189. The next prime is 213173201. The reversal of 213173198 is 891371312.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 7 ways as a sum of consecutive naturals, for example, 400436 + ... + 400967.

It is an arithmetic number, because the mean of its divisors is an integer number (24042120).

Almost surely, 2^213173198 is an apocalyptic number.

213173198 is a deficient number, since it is larger than the sum of its proper divisors (171500722).

213173198 is a wasteful number, since it uses less digits than its factorization.

213173198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801431.

The product of its digits is 9072, while the sum is 35.

The square root of 213173198 is about 14600.4519793053. The cubic root of 213173198 is about 597.3710889415.

The spelling of 213173198 in words is "two hundred thirteen million, one hundred seventy-three thousand, one hundred ninety-eight".