81184103 has 48 divisors (see below), whose sum is σ = 112435008. Its totient is φ = 57024000.

The previous prime is 81184091. The next prime is 81184121. The reversal of 81184103 is 30148118.

It is not a de Polignac number, because 81184103 - 2¹² = 81180007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81184123) 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, 803753 + ... + 803853.

It is an arithmetic number, because the mean of its divisors is an integer number (2342396).

Almost surely, 2^81184103 is an apocalyptic number.

81184103 is a deficient number, since it is larger than the sum of its proper divisors (31250905).

81184103 is a wasteful number, since it uses less digits than its factorization.

81184103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 81184103 is about 9010.2221393260. Note that the first 3 decimals coincide. The cubic root of 81184103 is about 433.0024285733.

It can be divided in two parts, 8118 and 4103, that added together give a palindrome (12221).

The spelling of 81184103 in words is "eighty-one million, one hundred eighty-four thousand, one hundred three".