81000595 has 16 divisors (see below), whose sum is σ = 109230912. Its totient is φ = 57214080.

The previous prime is 81000593. The next prime is 81000643. The reversal of 81000595 is 59500018.

It is not a de Polignac number, because 81000595 - 2¹ = 81000593 is a prime.

It is a super-2 number, since 2×81000595² = 13122192780708050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81000593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25596 + ... + 28585.

It is an arithmetic number, because the mean of its divisors is an integer number (6826932).

Almost surely, 2^81000595 is an apocalyptic number.

81000595 is a deficient number, since it is larger than the sum of its proper divisors (28230317).

81000595 is a wasteful number, since it uses less digits than its factorization.

81000595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54222.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 81000595 is about 9000.0330554949. The cubic root of 81000595 is about 432.6759305199.

The spelling of 81000595 in words is "eighty-one million, five hundred ninety-five", and thus it is an aban number.