85922021 has 2 divisors, whose sum is σ = 85922022. Its totient is φ = 85922020.

The previous prime is 85922017. The next prime is 85922033. The reversal of 85922021 is 12022958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85840225 + 81796 = 9265^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 85922021 - 2² = 85922017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85922071) 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, 42961010 + 42961011.

It is an arithmetic number, because the mean of its divisors is an integer number (42961011).

Almost surely, 2^85922021 is an apocalyptic number.

It is an amenable number.

85922021 is a deficient number, since it is larger than the sum of its proper divisors (1).

85922021 is an equidigital number, since it uses as much as digits as its factorization.

85922021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 85922021 is about 9269.4131960982. The cubic root of 85922021 is about 441.2670451676.

Adding to 85922021 its reverse (12022958), we get a palindrome (97944979).

The spelling of 85922021 in words is "eighty-five million, nine hundred twenty-two thousand, twenty-one".