81108033 has 16 divisors (see below), whose sum is σ = 112121280. Its totient is φ = 52111296.

The previous prime is 81108031. The next prime is 81108043. The reversal of 81108033 is 33080118.

It is not a de Polignac number, because 81108033 - 2¹ = 81108031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81107994 and 81108012.

It is not an unprimeable number, because it can be changed into a prime (81108031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8463 + ... + 15291.

It is an arithmetic number, because the mean of its divisors is an integer number (7007580).

Almost surely, 2^81108033 is an apocalyptic number.

It is an amenable number.

81108033 is a deficient number, since it is larger than the sum of its proper divisors (31013247).

81108033 is a wasteful number, since it uses less digits than its factorization.

81108033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6976.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 81108033 is about 9005.9998334444. Note that the first 3 decimals coincide. The cubic root of 81108033 is about 432.8671443377.

The spelling of 81108033 in words is "eighty-one million, one hundred eight thousand, thirty-three".