81230875 has 16 divisors (see below), whose sum is σ = 110594016. Its totient is φ = 59076000.

The previous prime is 81230857. The next prime is 81230893. The reversal of 81230875 is 57803218.

It is an interprime number because it is at equal distance from previous prime (81230857) and next prime (81230893).

It is not a de Polignac number, because 81230875 - 2¹⁵ = 81198107 is a prime.

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 81230875.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28164 + ... + 30913.

It is an arithmetic number, because the mean of its divisors is an integer number (6912126).

Almost surely, 2^81230875 is an apocalyptic number.

81230875 is a deficient number, since it is larger than the sum of its proper divisors (29363141).

81230875 is a wasteful number, since it uses less digits than its factorization.

81230875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59103 (or 59093 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 81230875 is about 9012.8172620996. The cubic root of 81230875 is about 433.0855667773.

The spelling of 81230875 in words is "eighty-one million, two hundred thirty thousand, eight hundred seventy-five".