81010033 has 8 divisors (see below), whose sum is σ = 87369408. Its totient is φ = 74668944.

The previous prime is 81010003. The next prime is 81010043. The reversal of 81010033 is 33001018.

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 81010033 - 2⁵ = 81010001 is a prime.

It is a super-2 number, since 2×81010033² = 13125250893322178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81009989 and 81010016.

It is not an unprimeable number, because it can be changed into a prime (81010003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5466 + ... + 13852.

It is an arithmetic number, because the mean of its divisors is an integer number (10921176).

Almost surely, 2^81010033 is an apocalyptic number.

It is an amenable number.

81010033 is a deficient number, since it is larger than the sum of its proper divisors (6359375).

81010033 is a wasteful number, since it uses less digits than its factorization.

81010033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9143.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 81010033 is about 9000.5573716298. The cubic root of 81010033 is about 432.6927346633.

The spelling of 81010033 in words is "eighty-one million, ten thousand, thirty-three".