81814294 has 16 divisors (see below), whose sum is σ = 127353600. Its totient is φ = 39390120.

The previous prime is 81814267. The next prime is 81814309. The reversal of 81814294 is 49241818.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594 + ... + 12805.

It is an arithmetic number, because the mean of its divisors is an integer number (7959600).

Almost surely, 2^81814294 is an apocalyptic number.

81814294 is a deficient number, since it is larger than the sum of its proper divisors (45539306).

81814294 is a wasteful number, since it uses less digits than its factorization.

81814294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13515.

The product of its digits is 18432, while the sum is 37.

The square root of 81814294 is about 9045.1254275438. The cubic root of 81814294 is about 434.1199347156.

The spelling of 81814294 in words is "eighty-one million, eight hundred fourteen thousand, two hundred ninety-four".