213189172 has 24 divisors (see below), whose sum is σ = 427933184. Its totient is φ = 91033632.

The previous prime is 213189169. The next prime is 213189173. The reversal of 213189172 is 271981312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213189173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5988 + ... + 21499.

Almost surely, 2^213189172 is an apocalyptic number.

It is an amenable number.

213189172 is an abundant number, since it is smaller than the sum of its proper divisors (214744012).

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

213189172 is a wasteful number, since it uses less digits than its factorization.

213189172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27775 (or 27773 counting only the distinct ones).

The product of its digits is 6048, while the sum is 34.

The square root of 213189172 is about 14600.9990069173. Note that the first 3 decimals coincide. The cubic root of 213189172 is about 597.3860097782.

The spelling of 213189172 in words is "two hundred thirteen million, one hundred eighty-nine thousand, one hundred seventy-two".