85522681 has 8 divisors (see below), whose sum is σ = 86977800. Its totient is φ = 84078720.

The previous prime is 85522673. The next prime is 85522687. The reversal of 85522681 is 18622558.

It can be written as a sum of positive squares in 4 ways, for example, as 18020025 + 67502656 = 4245^2 + 8216^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85522681 - 2³ = 85522673 is a prime.

It is a super-2 number, since 2×85522681² = 14628257930855522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85522681.

It is not an unprimeable number, because it can be changed into a prime (85522687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13455 + ... + 18763.

It is an arithmetic number, because the mean of its divisors is an integer number (10872225).

Almost surely, 2^85522681 is an apocalyptic number.

It is an amenable number.

85522681 is a deficient number, since it is larger than the sum of its proper divisors (1455119).

85522681 is a wasteful number, since it uses less digits than its factorization.

85522681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579.

The product of its digits is 38400, while the sum is 37.

The square root of 85522681 is about 9247.8473711454. The cubic root of 85522681 is about 440.5823573306.

The spelling of 85522681 in words is "eighty-five million, five hundred twenty-two thousand, six hundred eighty-one".