85224641 has 2 divisors, whose sum is σ = 85224642. Its totient is φ = 85224640.

The previous prime is 85224599. The next prime is 85224679. The reversal of 85224641 is 14642258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52780225 + 32444416 = 7265^2 + 5696^2 .

It is a cyclic number.

It is not a de Polignac number, because 85224641 - 2⁶ = 85224577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85224598 and 85224607.

It is not a weakly prime, because it can be changed into another prime (85227641) 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, 42612320 + 42612321.

It is an arithmetic number, because the mean of its divisors is an integer number (42612321).

Almost surely, 2^85224641 is an apocalyptic number.

It is an amenable number.

85224641 is a deficient number, since it is larger than the sum of its proper divisors (1).

85224641 is an equidigital number, since it uses as much as digits as its factorization.

85224641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 32.

The square root of 85224641 is about 9231.7192873267. The cubic root of 85224641 is about 440.0699630484.

Adding to 85224641 its reverse (14642258), we get a palindrome (99866899).

The spelling of 85224641 in words is "eighty-five million, two hundred twenty-four thousand, six hundred forty-one".