81103110 has 64 divisors (see below), whose sum is σ = 213684480. Its totient is φ = 19537280.

The previous prime is 81103109. The next prime is 81103133. The reversal of 81103110 is 1130118.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 81103110.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 58384 + ... + 59756.

It is an arithmetic number, because the mean of its divisors is an integer number (3338820).

Almost surely, 2^81103110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81103110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106842240).

81103110 is an abundant number, since it is smaller than the sum of its proper divisors (132581370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81103110 is a wasteful number, since it uses less digits than its factorization.

81103110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 81103110 is about 9005.7265115037. The cubic root of 81103110 is about 432.8583862735.

Adding to 81103110 its reverse (1130118), we get a palindrome (82233228).

The spelling of 81103110 in words is "eighty-one million, one hundred three thousand, one hundred ten".