213109194 has 16 divisors (see below), whose sum is σ = 430613568. Its totient is φ = 70303872.

The previous prime is 213109181. The next prime is 213109199. The reversal of 213109194 is 491901312.

It is not an unprimeable number, because it can be changed into a prime (213109199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182502 + ... + 183665.

It is an arithmetic number, because the mean of its divisors is an integer number (26913348).

Almost surely, 2^213109194 is an apocalyptic number.

213109194 is an abundant number, since it is smaller than the sum of its proper divisors (217504374).

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

213109194 is a wasteful number, since it uses less digits than its factorization.

213109194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366269.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 213109194 is about 14598.2599648040. The cubic root of 213109194 is about 597.3112972374.

The spelling of 213109194 in words is "two hundred thirteen million, one hundred nine thousand, one hundred ninety-four".