81111304 has 32 divisors (see below), whose sum is σ = 160776000. Its totient is φ = 38256192.

The previous prime is 81111269. The next prime is 81111313. The reversal of 81111304 is 40311118.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38962 + ... + 40990.

It is an arithmetic number, because the mean of its divisors is an integer number (5024250).

Almost surely, 2^81111304 is an apocalyptic number.

It is an amenable number.

81111304 is a deficient number, since it is larger than the sum of its proper divisors (79664696).

81111304 is a wasteful number, since it uses less digits than its factorization.

81111304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317 (or 2313 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 81111304 is about 9006.1814327716. The cubic root of 81111304 is about 432.8729632820.

The spelling of 81111304 in words is "eighty-one million, one hundred eleven thousand, three hundred four".