85816031 has 16 divisors (see below), whose sum is σ = 101882880. Its totient is φ = 70755360.

The previous prime is 85816007. The next prime is 85816117. The reversal of 85816031 is 13061858.

It is a cyclic number.

It is not a de Polignac number, because 85816031 - 2¹⁴ = 85799647 is a prime.

It is a super-2 number, since 2×85816031² = 14728782353185922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85816231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17201 + ... + 21621.

It is an arithmetic number, because the mean of its divisors is an integer number (6367680).

Almost surely, 2^85816031 is an apocalyptic number.

85816031 is a deficient number, since it is larger than the sum of its proper divisors (16066849).

85816031 is a wasteful number, since it uses less digits than its factorization.

85816031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 85816031 is about 9263.6942415000. The cubic root of 85816031 is about 441.0855273295.

Adding to 85816031 its reverse (13061858), we get a palindrome (98877889).

The spelling of 85816031 in words is "eighty-five million, eight hundred sixteen thousand, thirty-one".