213156194 has 16 divisors (see below), whose sum is σ = 323477280. Its totient is φ = 105336000.

The previous prime is 213156187. The next prime is 213156197. The reversal of 213156194 is 491651312.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213156194.

It is not an unprimeable number, because it can be changed into a prime (213156197) 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, 93569 + ... + 95819.

It is an arithmetic number, because the mean of its divisors is an integer number (20217330).

Almost surely, 2^213156194 is an apocalyptic number.

213156194 is a deficient number, since it is larger than the sum of its proper divisors (110321086).

213156194 is a wasteful number, since it uses less digits than its factorization.

213156194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785.

The product of its digits is 6480, while the sum is 32.

The square root of 213156194 is about 14599.8696569524. The cubic root of 213156194 is about 597.3552051935.

The spelling of 213156194 in words is "two hundred thirteen million, one hundred fifty-six thousand, one hundred ninety-four".