81830116 has 9 divisors (see below), whose sum is σ = 143234371. Its totient is φ = 40906012.

The previous prime is 81830081. The next prime is 81830117. The reversal of 81830116 is 61103818.

It is a happy number.

The square root of 81830116 is 9046.

It is a perfect power (a square), and thus also a powerful number.

81830116 is nontrivially palindromic in base 16.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81830117) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15831 + ... + 20353.

Almost surely, 2^81830116 is an apocalyptic number.

81830116 is the 9046-th square number.

It is an amenable number.

81830116 is a deficient number, since it is larger than the sum of its proper divisors (61404255).

81830116 is an frugal number, since it uses more digits than its factorization.

81830116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050 (or 4525 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The cubic root of 81830116 is about 434.1479176126.

The spelling of 81830116 in words is "eighty-one million, eight hundred thirty thousand, one hundred sixteen".