180115213 has 2 divisors, whose sum is σ = 180115214. Its totient is φ = 180115212.

The previous prime is 180115211. The next prime is 180115237. The reversal of 180115213 is 312511081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123609924 + 56505289 = 11118^2 + 7517^2 .

It is an emirp because it is prime and its reverse (312511081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180115213 - 2¹ = 180115211 is a prime.

Together with 180115211, 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 (180115211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90057606 + 90057607.

It is an arithmetic number, because the mean of its divisors is an integer number (90057607).

Almost surely, 2^180115213 is an apocalyptic number.

It is an amenable number.

180115213 is a deficient number, since it is larger than the sum of its proper divisors (1).

180115213 is an equidigital number, since it uses as much as digits as its factorization.

180115213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 180115213 is about 13420.7009131416. The cubic root of 180115213 is about 564.7420578398.

Adding to 180115213 its reverse (312511081), we get a palindrome (492626294).

The spelling of 180115213 in words is "one hundred eighty million, one hundred fifteen thousand, two hundred thirteen".