81012233 has 8 divisors (see below), whose sum is σ = 85555008. Its totient is φ = 76554544.

The previous prime is 81012229. The next prime is 81012247. The reversal of 81012233 is 33221018.

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

It is a cyclic number.

It is not a de Polignac number, because 81012233 - 2² = 81012229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81012223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19310 + ... + 23127.

It is an arithmetic number, because the mean of its divisors is an integer number (10694376).

Almost surely, 2^81012233 is an apocalyptic number.

81012233 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

81012233 is a deficient number, since it is larger than the sum of its proper divisors (4542775).

81012233 is a wasteful number, since it uses less digits than its factorization.

81012233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42543.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 81012233 is about 9000.6795854535. The cubic root of 81012233 is about 432.6966515254.

The spelling of 81012233 in words is "eighty-one million, twelve thousand, two hundred thirty-three".