85511159 has 4 divisors (see below), whose sum is σ = 85954416. Its totient is φ = 85067904.

The previous prime is 85511143. The next prime is 85511177. The reversal of 85511159 is 95111558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85511159 - 2⁴ = 85511143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85511059) 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, 221339 + ... + 221724.

It is an arithmetic number, because the mean of its divisors is an integer number (21488604).

Almost surely, 2^85511159 is an apocalyptic number.

85511159 is a deficient number, since it is larger than the sum of its proper divisors (443257).

85511159 is a wasteful number, since it uses less digits than its factorization.

85511159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443256.

The product of its digits is 9000, while the sum is 35.

The square root of 85511159 is about 9247.2243943791. The cubic root of 85511159 is about 440.5625706968.

The spelling of 85511159 in words is "eighty-five million, five hundred eleven thousand, one hundred fifty-nine".