81110051 has 12 divisors (see below), whose sum is σ = 89577096. Its totient is φ = 73386720.

The previous prime is 81110047. The next prime is 81110059. The reversal of 81110051 is 15001118.

It is not a de Polignac number, because 81110051 - 2² = 81110047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81110059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25991 + ... + 28943.

It is an arithmetic number, because the mean of its divisors is an integer number (7464758).

Almost surely, 2^81110051 is an apocalyptic number.

81110051 is a deficient number, since it is larger than the sum of its proper divisors (8467045).

81110051 is a wasteful number, since it uses less digits than its factorization.

81110051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202 (or 3191 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 17.

The square root of 81110051 is about 9006.1118691697. Note that the first 3 decimals coincide. The cubic root of 81110051 is about 432.8707342766.

Adding to 81110051 its reverse (15001118), we get a palindrome (96111169).

The spelling of 81110051 in words is "eighty-one million, one hundred ten thousand, fifty-one".