85814551 has 4 divisors (see below), whose sum is σ = 85833504. Its totient is φ = 85795600.

The previous prime is 85814543. The next prime is 85814593. The reversal of 85814551 is 15541858.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15541858 = 2 ⋅7770929.

It is a cyclic number.

It is not a de Polignac number, because 85814551 - 2³ = 85814543 is a prime.

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 85814551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85854551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1746 + ... + 13216.

It is an arithmetic number, because the mean of its divisors is an integer number (21458376).

Almost surely, 2^85814551 is an apocalyptic number.

85814551 is a deficient number, since it is larger than the sum of its proper divisors (18953).

85814551 is a wasteful number, since it uses less digits than its factorization.

85814551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18952.

The product of its digits is 32000, while the sum is 37.

The square root of 85814551 is about 9263.6143594172. The cubic root of 85814551 is about 441.0829916326.

The spelling of 85814551 in words is "eighty-five million, eight hundred fourteen thousand, five hundred fifty-one".