81106183 has 4 divisors (see below), whose sum is σ = 83298280. Its totient is φ = 78914088.

The previous prime is 81106171. The next prime is 81106229. The reversal of 81106183 is 38160118.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81106183 - 2⁹ = 81105671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81106163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1095993 + ... + 1096066.

It is an arithmetic number, because the mean of its divisors is an integer number (20824570).

Almost surely, 2^81106183 is an apocalyptic number.

81106183 is a deficient number, since it is larger than the sum of its proper divisors (2192097).

81106183 is a wasteful number, since it uses less digits than its factorization.

81106183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192096.

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

The square root of 81106183 is about 9005.8971235519. The cubic root of 81106183 is about 432.8638532115.

The spelling of 81106183 in words is "eighty-one million, one hundred six thousand, one hundred eighty-three".