509164219 has 2 divisors, whose sum is σ = 509164220. Its totient is φ = 509164218.

The previous prime is 509164211. The next prime is 509164231. The reversal of 509164219 is 912461905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509164219 - 2³ = 509164211 is a prime.

It is a super-2 number, since 2×509164219² = 518496403819759922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (509164211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254582109 + 254582110.

It is an arithmetic number, because the mean of its divisors is an integer number (254582110).

Almost surely, 2^509164219 is an apocalyptic number.

509164219 is a deficient number, since it is larger than the sum of its proper divisors (1).

509164219 is an equidigital number, since it uses as much as digits as its factorization.

509164219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 509164219 is about 22564.6674914566. The cubic root of 509164219 is about 798.5202955099.

The spelling of 509164219 in words is "five hundred nine million, one hundred sixty-four thousand, two hundred nineteen".