81030895 has 16 divisors (see below), whose sum is σ = 107879040. Its totient is φ = 57930400.

The previous prime is 81030889. The next prime is 81030899. The reversal of 81030895 is 59803018.

It is not a de Polignac number, because 81030895 - 2⁷ = 81030767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81030895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81030899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9241 + ... + 15730.

It is an arithmetic number, because the mean of its divisors is an integer number (6742440).

Almost surely, 2^81030895 is an apocalyptic number.

81030895 is a deficient number, since it is larger than the sum of its proper divisors (26848145).

81030895 is a wasteful number, since it uses less digits than its factorization.

81030895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25046.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 81030895 is about 9001.7162252539. The cubic root of 81030895 is about 432.7298743472.

The spelling of 81030895 in words is "eighty-one million, thirty thousand, eight hundred ninety-five".