243611161 has 12 divisors (see below), whose sum is σ = 251183268. Its totient is φ = 236175264.

The previous prime is 243611117. The next prime is 243611167. The reversal of 243611161 is 161116342.

It can be written as a sum of positive squares in 2 ways, for example, as 201100761 + 42510400 = 14181^2 + 6520^2 .

It is not a de Polignac number, because 243611161 - 2⁹ = 243610649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243611167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1408071 + ... + 1408243.

It is an arithmetic number, because the mean of its divisors is an integer number (20931939).

Almost surely, 2^243611161 is an apocalyptic number.

It is an amenable number.

243611161 is a deficient number, since it is larger than the sum of its proper divisors (7572107).

243611161 is an equidigital number, since it uses as much as digits as its factorization.

243611161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 389 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 243611161 is about 15608.0479561026. The cubic root of 243611161 is about 624.5478637153.

The spelling of 243611161 in words is "two hundred forty-three million, six hundred eleven thousand, one hundred sixty-one".