213173166 has 16 divisors (see below), whose sum is σ = 451425744. Its totient is φ = 66877824.

The previous prime is 213173111. The next prime is 213173189. The reversal of 213173166 is 661371312.

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, 1044865 + ... + 1045068.

It is an arithmetic number, because the mean of its divisors is an integer number (28214109).

Almost surely, 2^213173166 is an apocalyptic number.

213173166 is an abundant number, since it is smaller than the sum of its proper divisors (238252578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213173166 is a wasteful number, since it uses less digits than its factorization.

213173166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089955.

The product of its digits is 4536, while the sum is 30.

The square root of 213173166 is about 14600.4508834488. The cubic root of 213173166 is about 597.3710590505.

The spelling of 213173166 in words is "two hundred thirteen million, one hundred seventy-three thousand, one hundred sixty-six".