81852118 has 8 divisors (see below), whose sum is σ = 124791120. Its totient is φ = 40255080.

The previous prime is 81852109. The next prime is 81852119. The reversal of 81852118 is 81125818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81852119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335338 + ... + 335581.

It is an arithmetic number, because the mean of its divisors is an integer number (15598890).

Almost surely, 2^81852118 is an apocalyptic number.

81852118 is a deficient number, since it is larger than the sum of its proper divisors (42939002).

81852118 is a wasteful number, since it uses less digits than its factorization.

81852118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670982.

The product of its digits is 5120, while the sum is 34.

The square root of 81852118 is about 9047.2160358864. The cubic root of 81852118 is about 434.1868245048.

The spelling of 81852118 in words is "eighty-one million, eight hundred fifty-two thousand, one hundred eighteen".