81112233 has 16 divisors (see below), whose sum is σ = 111558656. Its totient is φ = 52390800.

The previous prime is 81112231. The next prime is 81112259. The reversal of 81112233 is 33221118.

It is not a de Polignac number, because 81112233 - 2¹ = 81112231 is a prime.

It is a super-3 number, since 3×81112233³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81112231) 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, 13908 + ... + 18858.

It is an arithmetic number, because the mean of its divisors is an integer number (6972416).

Almost surely, 2^81112233 is an apocalyptic number.

It is an amenable number.

81112233 is a deficient number, since it is larger than the sum of its proper divisors (30446423).

81112233 is a wasteful number, since it uses less digits than its factorization.

81112233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124.

The product of its digits is 288, while the sum is 21.

The square root of 81112233 is about 9006.2330083115. The cubic root of 81112233 is about 432.8746158978.

The spelling of 81112233 in words is "eighty-one million, one hundred twelve thousand, two hundred thirty-three".