81113103 has 32 divisors (see below), whose sum is σ = 129366720. Its totient is φ = 50042880.

The previous prime is 81113101. The next prime is 81113119. The reversal of 81113103 is 30131118.

It is a happy number.

It is not a de Polignac number, because 81113103 - 2¹ = 81113101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81113101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26551 + ... + 29447.

It is an arithmetic number, because the mean of its divisors is an integer number (4042710).

Almost surely, 2^81113103 is an apocalyptic number.

81113103 is a deficient number, since it is larger than the sum of its proper divisors (48253617).

81113103 is a wasteful number, since it uses less digits than its factorization.

81113103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984 (or 2978 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 81113103 is about 9006.2813080649. The cubic root of 81113103 is about 432.8761635458.

It can be divided in two parts, 8 and 1113103, that added together give a palindrome (1113111).

The spelling of 81113103 in words is "eighty-one million, one hundred thirteen thousand, one hundred three".