81112375 has 32 divisors (see below), whose sum is σ = 107153280. Its totient is φ = 61177600.

The previous prime is 81112363. The next prime is 81112379. The reversal of 81112375 is 57321118.

It is not a de Polignac number, because 81112375 - 2¹⁹ = 80588087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81112379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255717 + ... + 256033.

It is an arithmetic number, because the mean of its divisors is an integer number (3348540).

Almost surely, 2^81112375 is an apocalyptic number.

81112375 is a deficient number, since it is larger than the sum of its proper divisors (26040905).

81112375 is a wasteful number, since it uses less digits than its factorization.

81112375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 434 counting only the distinct ones).

The product of its digits is 1680, while the sum is 28.

The square root of 81112375 is about 9006.2408917372. The cubic root of 81112375 is about 432.8748685031.

The spelling of 81112375 in words is "eighty-one million, one hundred twelve thousand, three hundred seventy-five".