81103082 has 8 divisors (see below), whose sum is σ = 125849700. Its totient is φ = 39153184.

The previous prime is 81103081. The next prime is 81103109. The reversal of 81103082 is 28030118.

It can be written as a sum of positive squares in 2 ways, for example, as 72097081 + 9006001 = 8491^2 + 3001^2 .

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

It is not an unprimeable number, because it can be changed into a prime (81103081) 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, 699107 + ... + 699222.

Almost surely, 2^81103082 is an apocalyptic number.

81103082 is a deficient number, since it is larger than the sum of its proper divisors (44746618).

81103082 is a wasteful number, since it uses less digits than its factorization.

81103082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398360.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 81103082 is about 9005.7249569371. The cubic root of 81103082 is about 432.8583364602.

The spelling of 81103082 in words is "eighty-one million, one hundred three thousand, eighty-two".