2150509 has 2 divisors, whose sum is σ = 2150510. Its totient is φ = 2150508.

The previous prime is 2150471. The next prime is 2150513. The reversal of 2150509 is 9050512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1988100 + 162409 = 1410^2 + 403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2150509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2150509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2150009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075254 + 1075255.

It is an arithmetic number, because the mean of its divisors is an integer number (1075255).

2^2150509 is an apocalyptic number.

It is an amenable number.

2150509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2150509 is an equidigital number, since it uses as much as digits as its factorization.

2150509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 2150509 is about 1466.4613871494. The cubic root of 2150509 is about 129.0764724948.

The spelling of 2150509 in words is "two million, one hundred fifty thousand, five hundred nine".