81803182 has 8 divisors (see below), whose sum is σ = 122743152. Its totient is φ = 40888800.

The previous prime is 81803177. The next prime is 81803207. The reversal of 81803182 is 28130818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9382 + ... + 15862.

It is an arithmetic number, because the mean of its divisors is an integer number (15342894).

Almost surely, 2^81803182 is an apocalyptic number.

81803182 is a deficient number, since it is larger than the sum of its proper divisors (40939970).

81803182 is a wasteful number, since it uses less digits than its factorization.

81803182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12794.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 81803182 is about 9044.5111531801. The cubic root of 81803182 is about 434.1002798000.

The spelling of 81803182 in words is "eighty-one million, eight hundred three thousand, one hundred eighty-two".