822171061 has 2 divisors, whose sum is σ = 822171062. Its totient is φ = 822171060.

The previous prime is 822171037. The next prime is 822171071. The reversal of 822171061 is 160171228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 812592036 + 9579025 = 28506^2 + 3095^2 .

It is a cyclic number.

It is not a de Polignac number, because 822171061 - 2¹¹ = 822169013 is a prime.

It is equal to p_42227164 and since 822171061 and 42227164 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (822171071) 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, 411085530 + 411085531.

It is an arithmetic number, because the mean of its divisors is an integer number (411085531).

Almost surely, 2^822171061 is an apocalyptic number.

It is an amenable number.

822171061 is a deficient number, since it is larger than the sum of its proper divisors (1).

822171061 is an equidigital number, since it uses as much as digits as its factorization.

822171061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 822171061 is about 28673.5254372391. The cubic root of 822171061 is about 936.8154879070.

The spelling of 822171061 in words is "eight hundred twenty-two million, one hundred seventy-one thousand, sixty-one".