81852183 has 24 divisors (see below), whose sum is σ = 139483136. Its totient is φ = 45262800.

The previous prime is 81852167. The next prime is 81852223. The reversal of 81852183 is 38125818.

It is not a de Polignac number, because 81852183 - 2⁴ = 81852167 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81852283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19003 + ... + 22908.

Almost surely, 2^81852183 is an apocalyptic number.

81852183 is a deficient number, since it is larger than the sum of its proper divisors (57630953).

81852183 is a wasteful number, since it uses less digits than its factorization.

81852183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41955 (or 41952 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 81852183 is about 9047.2196281510. The cubic root of 81852183 is about 434.1869394362.

The spelling of 81852183 in words is "eighty-one million, eight hundred fifty-two thousand, one hundred eighty-three".