180252509 has 2 divisors, whose sum is σ = 180252510. Its totient is φ = 180252508.

The previous prime is 180252491. The next prime is 180252533. The reversal of 180252509 is 905252081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155700484 + 24552025 = 12478^2 + 4955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180252509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180252109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90126254 + 90126255.

It is an arithmetic number, because the mean of its divisors is an integer number (90126255).

Almost surely, 2^180252509 is an apocalyptic number.

It is an amenable number.

180252509 is a deficient number, since it is larger than the sum of its proper divisors (1).

180252509 is an equidigital number, since it uses as much as digits as its factorization.

180252509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 180252509 is about 13425.8150218152. The cubic root of 180252509 is about 564.8855162617.

The spelling of 180252509 in words is "one hundred eighty million, two hundred fifty-two thousand, five hundred nine".