214116509 has 2 divisors, whose sum is σ = 214116510. Its totient is φ = 214116508.

The previous prime is 214116493. The next prime is 214116557. The reversal of 214116509 is 905611412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143472484 + 70644025 = 11978^2 + 8405^2 .

It is a cyclic number.

It is not a de Polignac number, because 214116509 - 2⁴ = 214116493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214116559) 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, 107058254 + 107058255.

It is an arithmetic number, because the mean of its divisors is an integer number (107058255).

Almost surely, 2^214116509 is an apocalyptic number.

It is an amenable number.

214116509 is a deficient number, since it is larger than the sum of its proper divisors (1).

214116509 is an equidigital number, since it uses as much as digits as its factorization.

214116509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 214116509 is about 14632.7204921026. The cubic root of 214116509 is about 598.2509330812.

The spelling of 214116509 in words is "two hundred fourteen million, one hundred sixteen thousand, five hundred nine".