81300318 has 32 divisors (see below), whose sum is σ = 181163520. Its totient is φ = 24111360.

The previous prime is 81300301. The next prime is 81300337.

81300318 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×81300318² = 13219483413802248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10003 + ... + 16206.

It is an arithmetic number, because the mean of its divisors is an integer number (5661360).

Almost surely, 2^81300318 is an apocalyptic number.

81300318 is an abundant number, since it is smaller than the sum of its proper divisors (99863202).

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

81300318 is a wasteful number, since it uses less digits than its factorization.

81300318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26272.

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

The square root of 81300318 is about 9016.6688971039. The cubic root of 81300318 is about 433.2089443105.

It can be divided in two parts, 81300 and 318, that added together give a palindrome (81618).

The spelling of 81300318 in words is "eighty-one million, three hundred thousand, three hundred eighteen".