81006033 has 8 divisors (see below), whose sum is σ = 108083808. Its totient is φ = 53966144.

The previous prime is 81006011. The next prime is 81006043. The reversal of 81006033 is 33060018.

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 81006033 - 2¹⁰ = 81005009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81006043) 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, 4035 + ... + 13352.

It is an arithmetic number, because the mean of its divisors is an integer number (13510476).

Almost surely, 2^81006033 is an apocalyptic number.

It is an amenable number.

81006033 is a deficient number, since it is larger than the sum of its proper divisors (27077775).

81006033 is a wasteful number, since it uses less digits than its factorization.

81006033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18943.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 81006033 is about 9000.3351604260. The cubic root of 81006033 is about 432.6856129140.

The spelling of 81006033 in words is "eighty-one million, six thousand, thirty-three".