85831311 has 8 divisors (see below), whose sum is σ = 117103360. Its totient is φ = 55890072.

The previous prime is 85831307. The next prime is 85831337. The reversal of 85831311 is 11313858.

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

It is not a de Polignac number, because 85831311 - 2² = 85831307 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 (85831381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332551 + ... + 332808.

It is an arithmetic number, because the mean of its divisors is an integer number (14637920).

Almost surely, 2^85831311 is an apocalyptic number.

85831311 is a deficient number, since it is larger than the sum of its proper divisors (31272049).

85831311 is a wasteful number, since it uses less digits than its factorization.

85831311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665405.

The product of its digits is 2880, while the sum is 30.

The square root of 85831311 is about 9264.5189297664. The cubic root of 85831311 is about 441.1117049827. Note that the first 3 decimals are identical.

The spelling of 85831311 in words is "eighty-five million, eight hundred thirty-one thousand, three hundred eleven".