85518311 has 4 divisors (see below), whose sum is σ = 85540224. Its totient is φ = 85496400.

The previous prime is 85518299. The next prime is 85518341. The reversal of 85518311 is 11381558.

It is a happy number.

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 85518311 - 2⁶ = 85518247 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 (85518341) 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, 3335 + ... + 13496.

It is an arithmetic number, because the mean of its divisors is an integer number (21385056).

Almost surely, 2^85518311 is an apocalyptic number.

85518311 is a deficient number, since it is larger than the sum of its proper divisors (21913).

85518311 is a wasteful number, since it uses less digits than its factorization.

85518311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21912.

The product of its digits is 4800, while the sum is 32.

The square root of 85518311 is about 9247.6110969266. The cubic root of 85518311 is about 440.5748529755.

Adding to 85518311 its reverse (11381558), we get a palindrome (96899869).

The spelling of 85518311 in words is "eighty-five million, five hundred eighteen thousand, three hundred eleven".