81038103 has 24 divisors (see below), whose sum is σ = 113333328. Its totient is φ = 51466752.

The previous prime is 81038081. The next prime is 81038107. The reversal of 81038103 is 30183018.

It is not a de Polignac number, because 81038103 - 2¹² = 81034007 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81038107) 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 23 ways as a sum of consecutive naturals, for example, 591451 + ... + 591587.

It is an arithmetic number, because the mean of its divisors is an integer number (4722222).

Almost surely, 2^81038103 is an apocalyptic number.

81038103 is a deficient number, since it is larger than the sum of its proper divisors (32295225).

81038103 is a wasteful number, since it uses less digits than its factorization.

81038103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 81038103 is about 9002.1165844483. The cubic root of 81038103 is about 432.7427049449.

The spelling of 81038103 in words is "eighty-one million, thirty-eight thousand, one hundred three".