243168031 has 2 divisors, whose sum is σ = 243168032. Its totient is φ = 243168030.

The previous prime is 243167963. The next prime is 243168041. The reversal of 243168031 is 130861342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243168031 is a prime.

It is a super-2 number, since 2×243168031² = 118261382600833922, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243168041) 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, 121584015 + 121584016.

It is an arithmetic number, because the mean of its divisors is an integer number (121584016).

Almost surely, 2^243168031 is an apocalyptic number.

243168031 is a deficient number, since it is larger than the sum of its proper divisors (1).

243168031 is an equidigital number, since it uses as much as digits as its factorization.

243168031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 243168031 is about 15593.8459335726. The cubic root of 243168031 is about 624.1689485754.

The spelling of 243168031 in words is "two hundred forty-three million, one hundred sixty-eight thousand, thirty-one".