820567211 has 2 divisors, whose sum is σ = 820567212. Its totient is φ = 820567210.

The previous prime is 820567177. The next prime is 820567217. The reversal of 820567211 is 112765028.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 820567211 - 2¹⁴ = 820550827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (820567217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410283605 + 410283606.

It is an arithmetic number, because the mean of its divisors is an integer number (410283606).

Almost surely, 2^820567211 is an apocalyptic number.

820567211 is a deficient number, since it is larger than the sum of its proper divisors (1).

820567211 is an equidigital number, since it uses as much as digits as its factorization.

820567211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 820567211 is about 28645.5443481181. The cubic root of 820567211 is about 936.2059271721.

The spelling of 820567211 in words is "eight hundred twenty million, five hundred sixty-seven thousand, two hundred eleven".