243315029 has 2 divisors, whose sum is σ = 243315030. Its totient is φ = 243315028.

The previous prime is 243315013. The next prime is 243315047. The reversal of 243315029 is 920513342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173976100 + 69338929 = 13190^2 + 8327^2 .

It is a cyclic number.

It is not a de Polignac number, because 243315029 - 2⁴ = 243315013 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243314992 and 243315010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243315049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121657514 + 121657515.

It is an arithmetic number, because the mean of its divisors is an integer number (121657515).

Almost surely, 2^243315029 is an apocalyptic number.

It is an amenable number.

243315029 is a deficient number, since it is larger than the sum of its proper divisors (1).

243315029 is an equidigital number, since it uses as much as digits as its factorization.

243315029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 243315029 is about 15598.5585551999. The cubic root of 243315029 is about 624.2946957863.

The spelling of 243315029 in words is "two hundred forty-three million, three hundred fifteen thousand, twenty-nine".