81110424 has 32 divisors (see below), whose sum is σ = 203088240. Its totient is φ = 26995200.

The previous prime is 81110413. The next prime is 81110429. The reversal of 81110424 is 42401118.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 81110424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81110429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16044 + ... + 20484.

Almost surely, 2^81110424 is an apocalyptic number.

It is an amenable number.

81110424 is an abundant number, since it is smaller than the sum of its proper divisors (121977816).

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

81110424 is a wasteful number, since it uses less digits than its factorization.

81110424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5211 (or 5207 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 81110424 is about 9006.1325773053. The cubic root of 81110424 is about 432.8713978217.

The spelling of 81110424 in words is "eighty-one million, one hundred ten thousand, four hundred twenty-four".