81023033 has 32 divisors (see below), whose sum is σ = 102998784. Its totient is φ = 62042112.

The previous prime is 81023027. The next prime is 81023039. The reversal of 81023033 is 33032018.

It is an interprime number because it is at equal distance from previous prime (81023027) and next prime (81023039).

It is a cyclic number.

It is not a de Polignac number, because 81023033 - 2⁴ = 81023017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 81022996 and 81023014.

It is not an unprimeable number, because it can be changed into a prime (81023039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 591341 + ... + 591477.

It is an arithmetic number, because the mean of its divisors is an integer number (3218712).

Almost surely, 2^81023033 is an apocalyptic number.

It is an amenable number.

81023033 is a deficient number, since it is larger than the sum of its proper divisors (21975751).

81023033 is a wasteful number, since it uses less digits than its factorization.

81023033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 81023033 is about 9001.2795201571. The cubic root of 81023033 is about 432.7158787294.

The spelling of 81023033 in words is "eighty-one million, twenty-three thousand, thirty-three".