81233037 has 20 divisors (see below), whose sum is σ = 127737280. Its totient is φ = 51304104.

The previous prime is 81233023. The next prime is 81233041. The reversal of 81233037 is 73033218.

It is not a de Polignac number, because 81233037 - 2⁷ = 81232909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81233037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81233057) 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 19 ways as a sum of consecutive naturals, for example, 24853 + ... + 27930.

It is an arithmetic number, because the mean of its divisors is an integer number (6386864).

Almost surely, 2^81233037 is an apocalyptic number.

It is an amenable number.

81233037 is a deficient number, since it is larger than the sum of its proper divisors (46504243).

81233037 is a wasteful number, since it uses less digits than its factorization.

81233037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52814 (or 52805 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 81233037 is about 9012.9372016008. The cubic root of 81233037 is about 433.0894090055.

The spelling of 81233037 in words is "eighty-one million, two hundred thirty-three thousand, thirty-seven".