85100321 has 2 divisors, whose sum is σ = 85100322. Its totient is φ = 85100320.

The previous prime is 85100303. The next prime is 85100329. The reversal of 85100321 is 12300158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73273600 + 11826721 = 8560^2 + 3439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85100321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 85100293 and 85100302.

It is not a weakly prime, because it can be changed into another prime (85100329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42550160 + 42550161.

It is an arithmetic number, because the mean of its divisors is an integer number (42550161).

Almost surely, 2^85100321 is an apocalyptic number.

It is an amenable number.

85100321 is a deficient number, since it is larger than the sum of its proper divisors (1).

85100321 is an equidigital number, since it uses as much as digits as its factorization.

85100321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 85100321 is about 9224.9835230205. The cubic root of 85100321 is about 439.8558773844.

Adding to 85100321 its reverse (12300158), we get a palindrome (97400479).

The spelling of 85100321 in words is "eighty-five million, one hundred thousand, three hundred twenty-one".