81112365 has 24 divisors (see below), whose sum is σ = 143589888. Its totient is φ = 42338400.

The previous prime is 81112363. The next prime is 81112379. The reversal of 81112365 is 56321118.

It is not a de Polignac number, because 81112365 - 2¹ = 81112363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81112363) 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, 17061 + ... + 21290.

It is an arithmetic number, because the mean of its divisors is an integer number (5982912).

Almost surely, 2^81112365 is an apocalyptic number.

It is an amenable number.

81112365 is a deficient number, since it is larger than the sum of its proper divisors (62477523).

81112365 is a wasteful number, since it uses less digits than its factorization.

81112365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38409 (or 38406 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 81112365 is about 9006.2403365666. The cubic root of 81112365 is about 432.8748507140.

The spelling of 81112365 in words is "eighty-one million, one hundred twelve thousand, three hundred sixty-five".