85511031 has 8 divisors (see below), whose sum is σ = 114449280. Its totient is φ = 56790072.

The previous prime is 85510991. The next prime is 85511059. The reversal of 85511031 is 13011558.

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

It is not a de Polignac number, because 85511031 - 2⁷ = 85510903 is a prime.

It is a super-2 number, since 2×85511031² = 14624272845365922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85510992 and 85511010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85511131) 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, 53401 + ... + 54978.

It is an arithmetic number, because the mean of its divisors is an integer number (14306160).

Almost surely, 2^85511031 is an apocalyptic number.

85511031 is a deficient number, since it is larger than the sum of its proper divisors (28938249).

85511031 is a wasteful number, since it uses less digits than its factorization.

85511031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108645.

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 85511031 is about 9247.2174733808. The cubic root of 85511031 is about 440.5623508735.

Adding to 85511031 its reverse (13011558), we get a palindrome (98522589).

The spelling of 85511031 in words is "eighty-five million, five hundred eleven thousand, thirty-one".