85218701 has 2 divisors, whose sum is σ = 85218702. Its totient is φ = 85218700.

The previous prime is 85218697. The next prime is 85218709. The reversal of 85218701 is 10781258.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65593801 + 19624900 = 8099^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 85218701 - 2² = 85218697 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85218709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42609350 + 42609351.

It is an arithmetic number, because the mean of its divisors is an integer number (42609351).

Almost surely, 2^85218701 is an apocalyptic number.

It is an amenable number.

85218701 is a deficient number, since it is larger than the sum of its proper divisors (1).

85218701 is an equidigital number, since it uses as much as digits as its factorization.

85218701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 85218701 is about 9231.3975648327. The cubic root of 85218701 is about 440.0597387897.

Adding to 85218701 its reverse (10781258), we get a palindrome (95999959).

The spelling of 85218701 in words is "eighty-five million, two hundred eighteen thousand, seven hundred one".