212005193 has 2 divisors, whose sum is σ = 212005194. Its totient is φ = 212005192.

The previous prime is 212005177. The next prime is 212005217. The reversal of 212005193 is 391500212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169338169 + 42667024 = 13013^2 + 6532^2 .

It is a cyclic number.

It is not a de Polignac number, because 212005193 - 2⁴ = 212005177 is a prime.

It is not a weakly prime, because it can be changed into another prime (212005133) 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 as a sum of consecutive naturals, namely, 106002596 + 106002597.

It is an arithmetic number, because the mean of its divisors is an integer number (106002597).

Almost surely, 2^212005193 is an apocalyptic number.

It is an amenable number.

212005193 is a deficient number, since it is larger than the sum of its proper divisors (1).

212005193 is an equidigital number, since it uses as much as digits as its factorization.

212005193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 212005193 is about 14560.3981058211. The cubic root of 212005193 is about 596.2780643615.

The spelling of 212005193 in words is "two hundred twelve million, five thousand, one hundred ninety-three".