213875161 has 2 divisors, whose sum is σ = 213875162. Its totient is φ = 213875160.

The previous prime is 213875149. The next prime is 213875257. The reversal of 213875161 is 161578312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213715161 + 160000 = 14619^2 + 400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213875161 is a prime.

It is not a weakly prime, because it can be changed into another prime (223875161) 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, 106937580 + 106937581.

It is an arithmetic number, because the mean of its divisors is an integer number (106937581).

Almost surely, 2^213875161 is an apocalyptic number.

It is an amenable number.

213875161 is a deficient number, since it is larger than the sum of its proper divisors (1).

213875161 is an equidigital number, since it uses as much as digits as its factorization.

213875161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 213875161 is about 14624.4713066832. The cubic root of 213875161 is about 598.0260696010.

The spelling of 213875161 in words is "two hundred thirteen million, eight hundred seventy-five thousand, one hundred sixty-one".