80812219 has 2 divisors, whose sum is σ = 80812220. Its totient is φ = 80812218.

The previous prime is 80812201. The next prime is 80812231. The reversal of 80812219 is 91221808.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80812219 - 2¹⁹ = 80287931 is a prime.

It is a super-2 number, since 2×80812219² = 13061229479407922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80812619) by changing a digit.

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 as a sum of consecutive naturals, namely, 40406109 + 40406110.

It is an arithmetic number, because the mean of its divisors is an integer number (40406110).

Almost surely, 2^80812219 is an apocalyptic number.

80812219 is a deficient number, since it is larger than the sum of its proper divisors (1).

80812219 is an equidigital number, since it uses as much as digits as its factorization.

80812219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 80812219 is about 8989.5616689581. The cubic root of 80812219 is about 432.3402579796.

The spelling of 80812219 in words is "eighty million, eight hundred twelve thousand, two hundred nineteen".