203343243161 has 2 divisors, whose sum is σ = 203343243162. Its totient is φ = 203343243160.

The previous prime is 203343243157. The next prime is 203343243209. The reversal of 203343243161 is 161342343302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114274422025 + 89068821136 = 338045^2 + 298444^2 .

It is a cyclic number.

It is not a de Polignac number, because 203343243161 - 2² = 203343243157 is a prime.

It is not a weakly prime, because it can be changed into another prime (203342243161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101671621580 + 101671621581.

It is an arithmetic number, because the mean of its divisors is an integer number (101671621581).

Almost surely, 2^203343243161 is an apocalyptic number.

It is an amenable number.

203343243161 is a deficient number, since it is larger than the sum of its proper divisors (1).

203343243161 is an equidigital number, since it uses as much as digits as its factorization.

203343243161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 203343243161 its reverse (161342343302), we get a palindrome (364685586463).

The spelling of 203343243161 in words is "two hundred three billion, three hundred forty-three million, two hundred forty-three thousand, one hundred sixty-one".