81033033 has 8 divisors (see below), whose sum is σ = 114399648. Its totient is φ = 50844224.

The previous prime is 81033031. The next prime is 81033041. The reversal of 81033033 is 33033018.

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 81033033 - 2¹ = 81033031 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81033031) 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, 794391 + ... + 794492.

It is an arithmetic number, because the mean of its divisors is an integer number (14299956).

Almost surely, 2^81033033 is an apocalyptic number.

It is an amenable number.

81033033 is a deficient number, since it is larger than the sum of its proper divisors (33366615).

81033033 is a wasteful number, since it uses less digits than its factorization.

81033033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588903.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 81033033 is about 9001.8349796028. The cubic root of 81033033 is about 432.7336801727.

The spelling of 81033033 in words is "eighty-one million, thirty-three thousand, thirty-three".