85081031 has 16 divisors (see below), whose sum is σ = 104040960. Its totient is φ = 67949280.

The previous prime is 85081021. The next prime is 85081037. The reversal of 85081031 is 13018058.

It is not a de Polignac number, because 85081031 - 2¹⁰ = 85080007 is a prime.

It is a super-2 number, since 2×85081031² = 14477563672045922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85081037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2870 + ... + 13356.

It is an arithmetic number, because the mean of its divisors is an integer number (6502560).

Almost surely, 2^85081031 is an apocalyptic number.

85081031 is a deficient number, since it is larger than the sum of its proper divisors (18959929).

85081031 is a wasteful number, since it uses less digits than its factorization.

85081031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10574.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 85081031 is about 9223.9379334425. The cubic root of 85081031 is about 439.8226402945.

Adding to 85081031 its reverse (13018058), we get a palindrome (98099089).

The spelling of 85081031 in words is "eighty-five million, eighty-one thousand, thirty-one".