81103347 has 48 divisors (see below), whose sum is σ = 132787200. Its totient is φ = 47355840.

The previous prime is 81103331. The next prime is 81103369. The reversal of 81103347 is 74330118.

It is not a de Polignac number, because 81103347 - 2⁴ = 81103331 is a prime.

It is a super-3 number, since 3×81103347³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81103347.

It is not an unprimeable number, because it can be changed into a prime (81103307) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213804 + ... + 214182.

It is an arithmetic number, because the mean of its divisors is an integer number (2766400).

Almost surely, 2^81103347 is an apocalyptic number.

81103347 is a deficient number, since it is larger than the sum of its proper divisors (51683853).

81103347 is a wasteful number, since it uses less digits than its factorization.

81103347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 81103347 is about 9005.7396697884. The cubic root of 81103347 is about 432.8588079069.

It can be divided in two parts, 8 and 1103347, that added together give a triangular number (1103355 = T₁₄₈₅).

The spelling of 81103347 in words is "eighty-one million, one hundred three thousand, three hundred forty-seven".