81830122 has 12 divisors (see below), whose sum is σ = 134918658. Its totient is φ = 37195400.

The previous prime is 81830117. The next prime is 81830143. The reversal of 81830122 is 22103818.

It can be written as a sum of positive squares in only one way, i.e., 56115081 + 25715041 = 7491^2 + 5071^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168829 + ... + 169312.

Almost surely, 2^81830122 is an apocalyptic number.

81830122 is a deficient number, since it is larger than the sum of its proper divisors (53088536).

81830122 is a wasteful number, since it uses less digits than its factorization.

81830122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338165 (or 338154 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 81830122 is about 9046.0003316383. Note that the first 3 decimals coincide. The cubic root of 81830122 is about 434.1479282235.

The spelling of 81830122 in words is "eighty-one million, eight hundred thirty thousand, one hundred twenty-two".