81812114 has 8 divisors (see below), whose sum is σ = 124798320. Its totient is φ = 40212676.

The previous prime is 81812111. The next prime is 81812117. The reversal of 81812114 is 41121818.

It is an interprime number because it is at equal distance from previous prime (81812111) and next prime (81812117).

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (81812111) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 346544 + ... + 346779.

It is an arithmetic number, because the mean of its divisors is an integer number (15599790).

Almost surely, 2^81812114 is an apocalyptic number.

81812114 is a deficient number, since it is larger than the sum of its proper divisors (42986206).

81812114 is a wasteful number, since it uses less digits than its factorization.

81812114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693384.

The product of its digits is 512, while the sum is 26.

The square root of 81812114 is about 9045.0049198439. The cubic root of 81812114 is about 434.1160788700.

The spelling of 81812114 in words is "eighty-one million, eight hundred twelve thousand, one hundred fourteen".