81518114 has 8 divisors (see below), whose sum is σ = 123464640. Its totient is φ = 40363236.

The previous prime is 81518083. The next prime is 81518123. The reversal of 81518114 is 41181518.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197654 + ... + 198065.

It is an arithmetic number, because the mean of its divisors is an integer number (15433080).

Almost surely, 2^81518114 is an apocalyptic number.

81518114 is a deficient number, since it is larger than the sum of its proper divisors (41946526).

81518114 is a wasteful number, since it uses less digits than its factorization.

81518114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395824.

The product of its digits is 1280, while the sum is 29.

The square root of 81518114 is about 9028.7382285677. The cubic root of 81518114 is about 433.5954415594.

The spelling of 81518114 in words is "eighty-one million, five hundred eighteen thousand, one hundred fourteen".