80819181 has 8 divisors (see below), whose sum is σ = 119732160. Its totient is φ = 53879436.

The previous prime is 80819161. The next prime is 80819227. The reversal of 80819181 is 18191808.

It is not a de Polignac number, because 80819181 - 2¹⁵ = 80786413 is a prime.

It is a super-2 number, since 2×80819181² = 13063480035021522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80819161) 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, 1496625 + ... + 1496678.

It is an arithmetic number, because the mean of its divisors is an integer number (14966520).

Almost surely, 2^80819181 is an apocalyptic number.

It is an amenable number.

80819181 is a deficient number, since it is larger than the sum of its proper divisors (38912979).

80819181 is a wasteful number, since it uses less digits than its factorization.

80819181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993312 (or 2993306 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 80819181 is about 8989.9488875076. The cubic root of 80819181 is about 432.3526730429.

The spelling of 80819181 in words is "eighty million, eight hundred nineteen thousand, one hundred eighty-one".