81085203 has 12 divisors (see below), whose sum is σ = 117201240. Its totient is φ = 54020736.

The previous prime is 81085187. The next prime is 81085211. The reversal of 81085203 is 30258018.

It is a happy number.

It is not a de Polignac number, because 81085203 - 2⁴ = 81085187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81080203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24003 + ... + 27171.

It is an arithmetic number, because the mean of its divisors is an integer number (9766770).

Almost surely, 2^81085203 is an apocalyptic number.

81085203 is a deficient number, since it is larger than the sum of its proper divisors (36116037).

81085203 is a wasteful number, since it uses less digits than its factorization.

81085203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6018 (or 6015 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 81085203 is about 9004.7322558752. The cubic root of 81085203 is about 432.8265265595.

The spelling of 81085203 in words is "eighty-one million, eighty-five thousand, two hundred three".