81046185 has 32 divisors (see below), whose sum is σ = 144764928. Its totient is φ = 38377920.

The previous prime is 81046177. The next prime is 81046219. The reversal of 81046185 is 58164018.

It is not a de Polignac number, because 81046185 - 2³ = 81046177 is a prime.

It is a super-3 number, since 3×81046185³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1384 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (4523904).

Almost surely, 2^81046185 is an apocalyptic number.

It is an amenable number.

81046185 is a deficient number, since it is larger than the sum of its proper divisors (63718743).

81046185 is a wasteful number, since it uses less digits than its factorization.

81046185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11485.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 81046185 is about 9002.5654676875. The cubic root of 81046185 is about 432.7570904013.

The spelling of 81046185 in words is "eighty-one million, forty-six thousand, one hundred eighty-five".