80400217 has 2 divisors, whose sum is σ = 80400218. Its totient is φ = 80400216.

The previous prime is 80400211. The next prime is 80400233. The reversal of 80400217 is 71200408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72914521 + 7485696 = 8539^2 + 2736^2 .

It is a cyclic number.

It is not a de Polignac number, because 80400217 - 2¹¹ = 80398169 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80400211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40200108 + 40200109.

It is an arithmetic number, because the mean of its divisors is an integer number (40200109).

Almost surely, 2^80400217 is an apocalyptic number.

It is an amenable number.

80400217 is a deficient number, since it is larger than the sum of its proper divisors (1).

80400217 is an equidigital number, since it uses as much as digits as its factorization.

80400217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 80400217 is about 8966.6168090312. The cubic root of 80400217 is about 431.6042776086.

The spelling of 80400217 in words is "eighty million, four hundred thousand, two hundred seventeen".