85864551 has 8 divisors (see below), whose sum is σ = 115029504. Its totient is φ = 56971320.

The previous prime is 85864549. The next prime is 85864577. The reversal of 85864551 is 15546858.

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

It is not a de Polignac number, because 85864551 - 2¹ = 85864549 is a prime.

It is a super-2 number, since 2×85864551² = 14745442236863202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85864511) 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, 67191 + ... + 68456.

It is an arithmetic number, because the mean of its divisors is an integer number (14378688).

Almost surely, 2^85864551 is an apocalyptic number.

85864551 is a deficient number, since it is larger than the sum of its proper divisors (29164953).

85864551 is a wasteful number, since it uses less digits than its factorization.

85864551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135861.

The product of its digits is 192000, while the sum is 42.

The square root of 85864551 is about 9266.3126970764. The cubic root of 85864551 is about 441.1686409288.

The spelling of 85864551 in words is "eighty-five million, eight hundred sixty-four thousand, five hundred fifty-one".