81096233 has 4 divisors (see below), whose sum is σ = 81899268. Its totient is φ = 80293200.

The previous prime is 81096187. The next prime is 81096241. The reversal of 81096233 is 33269018.

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

It can be written as a sum of positive squares in 2 ways, for example, as 72726784 + 8369449 = 8528^2 + 2893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81096233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 81096233.

It is not an unprimeable number, because it can be changed into a prime (81096283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401366 + ... + 401567.

It is an arithmetic number, because the mean of its divisors is an integer number (20474817).

Almost surely, 2^81096233 is an apocalyptic number.

It is an amenable number.

81096233 is a deficient number, since it is larger than the sum of its proper divisors (803035).

81096233 is a wasteful number, since it uses less digits than its factorization.

81096233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803034.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 81096233 is about 9005.3446907934. The cubic root of 81096233 is about 432.8461514313.

The spelling of 81096233 in words is "eighty-one million, ninety-six thousand, two hundred thirty-three".