81030200200 has 48 divisors (see below), whose sum is σ = 188493577380. Its totient is φ = 32395157760.

The previous prime is 81030200149. The next prime is 81030200261. The reversal of 81030200200 is 200203018.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 57338218116 + 23691982084 = 239454^2 + 153922^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 281802 + ... + 491398.

Almost surely, 2^81030200200 is an apocalyptic number.

It is an amenable number.

81030200200 is an abundant number, since it is smaller than the sum of its proper divisors (107463377180).

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

81030200200 is a wasteful number, since it uses less digits than its factorization.

81030200200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211546 (or 211537 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 81030200200 its reverse (200203018), we get a palindrome (81230403218).

The spelling of 81030200200 in words is "eighty-one billion, thirty million, two hundred thousand, two hundred".