85218113 has 2 divisors, whose sum is σ = 85218114. Its totient is φ = 85218112.

The previous prime is 85218073. The next prime is 85218121. The reversal of 85218113 is 31181258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81504784 + 3713329 = 9028^2 + 1927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85218113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85218313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42609056 + 42609057.

It is an arithmetic number, because the mean of its divisors is an integer number (42609057).

Almost surely, 2^85218113 is an apocalyptic number.

It is an amenable number.

85218113 is a deficient number, since it is larger than the sum of its proper divisors (1).

85218113 is an equidigital number, since it uses as much as digits as its factorization.

85218113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 29.

The square root of 85218113 is about 9231.3657169457. The cubic root of 85218113 is about 440.0587266656.

The spelling of 85218113 in words is "eighty-five million, two hundred eighteen thousand, one hundred thirteen".