80551217 has 2 divisors, whose sum is σ = 80551218. Its totient is φ = 80551216.

The previous prime is 80551213. The next prime is 80551231. The reversal of 80551217 is 71215508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50069776 + 30481441 = 7076^2 + 5521^2 .

It is a cyclic number.

It is not a de Polignac number, because 80551217 - 2² = 80551213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80551217.

It is not a weakly prime, because it can be changed into another prime (80551213) 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, 40275608 + 40275609.

It is an arithmetic number, because the mean of its divisors is an integer number (40275609).

Almost surely, 2^80551217 is an apocalyptic number.

It is an amenable number.

80551217 is a deficient number, since it is larger than the sum of its proper divisors (1).

80551217 is an equidigital number, since it uses as much as digits as its factorization.

80551217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 80551217 is about 8975.0329804408. The cubic root of 80551217 is about 431.8743079260.

The spelling of 80551217 in words is "eighty million, five hundred fifty-one thousand, two hundred seventeen".