81832203 has 12 divisors (see below), whose sum is σ = 125155368. Its totient is φ = 51345600.

The previous prime is 81832199. The next prime is 81832211. The reversal of 81832203 is 30223818.

It is not a de Polignac number, because 81832203 - 2² = 81832199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81832213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267273 + ... + 267578.

It is an arithmetic number, because the mean of its divisors is an integer number (10429614).

Almost surely, 2^81832203 is an apocalyptic number.

81832203 is a deficient number, since it is larger than the sum of its proper divisors (43323165).

81832203 is a wasteful number, since it uses less digits than its factorization.

81832203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534874 (or 534871 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 81832203 is about 9046.1153541175. The cubic root of 81832203 is about 434.1516084257.

The spelling of 81832203 in words is "eighty-one million, eight hundred thirty-two thousand, two hundred three".