180215149 has 2 divisors, whose sum is σ = 180215150. Its totient is φ = 180215148.

The previous prime is 180215129. The next prime is 180215153. The reversal of 180215149 is 941512081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175562500 + 4652649 = 13250^2 + 2157^2 .

It is an emirp because it is prime and its reverse (941512081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180215149 - 2⁵ = 180215117 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 180215149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180215129) 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, 90107574 + 90107575.

It is an arithmetic number, because the mean of its divisors is an integer number (90107575).

Almost surely, 2^180215149 is an apocalyptic number.

It is an amenable number.

180215149 is a deficient number, since it is larger than the sum of its proper divisors (1).

180215149 is an equidigital number, since it uses as much as digits as its factorization.

180215149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 180215149 is about 13424.4236002891. The cubic root of 180215149 is about 564.8464866042.

The spelling of 180215149 in words is "one hundred eighty million, two hundred fifteen thousand, one hundred forty-nine".