81833255 has 8 divisors (see below), whose sum is σ = 112228512. Its totient is φ = 56114208.

The previous prime is 81833221. The next prime is 81833263. The reversal of 81833255 is 55233818.

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 81833255 - 2¹² = 81829159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 2338093 = 81833255 / (8 + 1 + 8 + 3 + 3 + 2 + 5 + 5).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1169012 + ... + 1169081.

It is an arithmetic number, because the mean of its divisors is an integer number (14028564).

Almost surely, 2^81833255 is an apocalyptic number.

81833255 is a deficient number, since it is larger than the sum of its proper divisors (30395257).

81833255 is a wasteful number, since it uses less digits than its factorization.

81833255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338105.

The product of its digits is 28800, while the sum is 35.

The square root of 81833255 is about 9046.1735004365. The cubic root of 81833255 is about 434.1534688405.

The spelling of 81833255 in words is "eighty-one million, eight hundred thirty-three thousand, two hundred fifty-five".