81710200 has 96 divisors (see below), whose sum is σ = 223266960. Its totient is φ = 27417600.

The previous prime is 81710183. The next prime is 81710207. The reversal of 81710200 is 201718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81710207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27172 + ... + 30028.

Almost surely, 2^81710200 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81710200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111633480).

81710200 is an abundant number, since it is smaller than the sum of its proper divisors (141556760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81710200 is a wasteful number, since it uses less digits than its factorization.

81710200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897 (or 2888 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 81710200 is about 9039.3694470356. The cubic root of 81710200 is about 433.9357433520.

Adding to 81710200 its reverse (201718), we get a palindrome (81911918).

The spelling of 81710200 in words is "eighty-one million, seven hundred ten thousand, two hundred".