212005194 has 16 divisors (see below), whose sum is σ = 432011232. Its totient is φ = 69334928.

The previous prime is 212005193. The next prime is 212005217. The reversal of 212005194 is 491500212.

It is not an unprimeable number, because it can be changed into a prime (212005193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333024 + ... + 333659.

It is an arithmetic number, because the mean of its divisors is an integer number (27000702).

Almost surely, 2^212005194 is an apocalyptic number.

212005194 is an abundant number, since it is smaller than the sum of its proper divisors (220006038).

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

212005194 is a wasteful number, since it uses less digits than its factorization.

212005194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666741.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 212005194 is about 14560.3981401609. The cubic root of 212005194 is about 596.2780652990.

The spelling of 212005194 in words is "two hundred twelve million, five thousand, one hundred ninety-four".