85265681 has 2 divisors, whose sum is σ = 85265682. Its totient is φ = 85265680.

The previous prime is 85265657. The next prime is 85265701. The reversal of 85265681 is 18656258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84640000 + 625681 = 9200^2 + 791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85265681 is a prime.

It is a super-2 number, since 2×85265681² = 14540472712787522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85265581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42632840 + 42632841.

It is an arithmetic number, because the mean of its divisors is an integer number (42632841).

Almost surely, 2^85265681 is an apocalyptic number.

It is an amenable number.

85265681 is a deficient number, since it is larger than the sum of its proper divisors (1).

85265681 is an equidigital number, since it uses as much as digits as its factorization.

85265681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 41.

The square root of 85265681 is about 9233.9417910229. The cubic root of 85265681 is about 440.1405904038.

The spelling of 85265681 in words is "eighty-five million, two hundred sixty-five thousand, six hundred eighty-one".