212662817 has 2 divisors, whose sum is σ = 212662818. Its totient is φ = 212662816.

The previous prime is 212662811. The next prime is 212662819. The reversal of 212662817 is 718266212.

212662817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189227536 + 23435281 = 13756^2 + 4841^2 .

It is a cyclic number.

It is not a de Polignac number, because 212662817 - 2¹⁸ = 212400673 is a prime.

Together with 212662819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212662811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106331408 + 106331409.

It is an arithmetic number, because the mean of its divisors is an integer number (106331409).

Almost surely, 2^212662817 is an apocalyptic number.

It is an amenable number.

212662817 is a deficient number, since it is larger than the sum of its proper divisors (1).

212662817 is an equidigital number, since it uses as much as digits as its factorization.

212662817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 212662817 is about 14582.9632448278. The cubic root of 212662817 is about 596.8939643911.

The spelling of 212662817 in words is "two hundred twelve million, six hundred sixty-two thousand, eight hundred seventeen".