212865833 has 2 divisors, whose sum is σ = 212865834. Its totient is φ = 212865832.

The previous prime is 212865803. The next prime is 212865869. The reversal of 212865833 is 338568212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212780569 + 85264 = 14587^2 + 292^2 .

It is a cyclic number.

It is not a de Polignac number, because 212865833 - 2¹⁸ = 212603689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (212865803) 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 as a sum of consecutive naturals, namely, 106432916 + 106432917.

It is an arithmetic number, because the mean of its divisors is an integer number (106432917).

Almost surely, 2^212865833 is an apocalyptic number.

It is an amenable number.

212865833 is a deficient number, since it is larger than the sum of its proper divisors (1).

212865833 is an equidigital number, since it uses as much as digits as its factorization.

212865833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The square root of 212865833 is about 14589.9223095944. The cubic root of 212865833 is about 597.0838431963.

The spelling of 212865833 in words is "two hundred twelve million, eight hundred sixty-five thousand, eight hundred thirty-three".