213148086209 has 2 divisors, whose sum is σ = 213148086210. Its totient is φ = 213148086208.

The previous prime is 213148086187. The next prime is 213148086253. The reversal of 213148086209 is 902680841312.

It is a happy number.

213148086209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (213148086253) can be obtained adding 213148086209 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202885383184 + 10262703025 = 450428^2 + 101305^2 .

It is a cyclic number.

It is not a de Polignac number, because 213148086209 - 2²⁰ = 213147037633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213148086209.

It is not a weakly prime, because it can be changed into another prime (213148086259) 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, 106574043104 + 106574043105.

It is an arithmetic number, because the mean of its divisors is an integer number (106574043105).

Almost surely, 2^213148086209 is an apocalyptic number.

It is an amenable number.

213148086209 is a deficient number, since it is larger than the sum of its proper divisors (1).

213148086209 is an equidigital number, since it uses as much as digits as its factorization.

213148086209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 213148086209 in words is "two hundred thirteen billion, one hundred forty-eight million, eighty-six thousand, two hundred nine".