85506281 has 8 divisors (see below), whose sum is σ = 99378240. Its totient is φ = 72048528.

The previous prime is 85506263. The next prime is 85506293. The reversal of 85506281 is 18260558.

It is a happy number.

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 85506281 - 2⁶ = 85506217 is a prime.

It is a super-2 number, since 2×85506281² = 14622648180901922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85506581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103106 + ... + 103931.

It is an arithmetic number, because the mean of its divisors is an integer number (12422280).

Almost surely, 2^85506281 is an apocalyptic number.

It is an amenable number.

85506281 is a deficient number, since it is larger than the sum of its proper divisors (13871959).

85506281 is a wasteful number, since it uses less digits than its factorization.

85506281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207103.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 85506281 is about 9246.9606357981. The cubic root of 85506281 is about 440.5541932129.

The spelling of 85506281 in words is "eighty-five million, five hundred six thousand, two hundred eighty-one".