85081281 has 8 divisors (see below), whose sum is σ = 114996000. Its totient is φ = 55943712.

The previous prime is 85081279. The next prime is 85081291. The reversal of 85081281 is 18218058.

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

It is not a de Polignac number, because 85081281 - 2¹ = 85081279 is a prime.

It is a super-2 number, since 2×85081281² = 14477648753201922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85081201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194031 + ... + 194468.

It is an arithmetic number, because the mean of its divisors is an integer number (14374500).

Almost surely, 2^85081281 is an apocalyptic number.

It is an amenable number.

85081281 is a deficient number, since it is larger than the sum of its proper divisors (29914719).

85081281 is a wasteful number, since it uses less digits than its factorization.

85081281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388575.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 85081281 is about 9223.9514851283. The cubic root of 85081281 is about 439.8230710821.

The spelling of 85081281 in words is "eighty-five million, eighty-one thousand, two hundred eighty-one".