212205919 has 2 divisors, whose sum is σ = 212205920. Its totient is φ = 212205918.

The previous prime is 212205913. The next prime is 212205923. The reversal of 212205919 is 919502212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212205919 - 2³ = 212205911 is a prime.

It is a super-2 number, since 2×212205919² = 90062704117269122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212205911) 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, 106102959 + 106102960.

It is an arithmetic number, because the mean of its divisors is an integer number (106102960).

Almost surely, 2^212205919 is an apocalyptic number.

212205919 is a deficient number, since it is larger than the sum of its proper divisors (1).

212205919 is an equidigital number, since it uses as much as digits as its factorization.

212205919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 212205919 is about 14567.2893497727. The cubic root of 212205919 is about 596.4661898744.

The spelling of 212205919 in words is "two hundred twelve million, two hundred five thousand, nine hundred nineteen".