2351509 has 2 divisors, whose sum is σ = 2351510. Its totient is φ = 2351508.

The previous prime is 2351507. The next prime is 2351513. The reversal of 2351509 is 9051532.

2351509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2340900 + 10609 = 1530^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 2351509 - 2¹ = 2351507 is a prime.

Together with 2351507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2351501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1175754 + 1175755.

It is an arithmetic number, because the mean of its divisors is an integer number (1175755).

2^2351509 is an apocalyptic number.

It is an amenable number.

2351509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2351509 is an equidigital number, since it uses as much as digits as its factorization.

2351509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 2351509 is about 1533.4630742212. The cubic root of 2351509 is about 132.9787404540.

The spelling of 2351509 in words is "two million, three hundred fifty-one thousand, five hundred nine".