81190 has 16 divisors (see below), whose sum is σ = 152928. Its totient is φ = 30976.

The previous prime is 81181. The next prime is 81197. The reversal of 81190 is 9118.

81190 is nontrivially palindromic in base 9.

It is a super-2 number, since 2×81190² = 13183632200, which contains 22 as substring.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54 + ... + 406.

It is an arithmetic number, because the mean of its divisors is an integer number (9558).

2⁸¹¹⁹⁰ is an apocalyptic number.

81190 is a deficient number, since it is larger than the sum of its proper divisors (71738).

81190 is a wasteful number, since it uses less digits than its factorization.

81190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 81190 is about 284.9385898751. The cubic root of 81190 is about 43.3012912372.

Subtracting from 81190 its product of nonzero digits (72), we obtain a palindrome (81118).

The spelling of 81190 in words is "eighty-one thousand, one hundred ninety".