243325013 has 2 divisors, whose sum is σ = 243325014. Its totient is φ = 243325012.

The previous prime is 243325009. The next prime is 243325057. The reversal of 243325013 is 310523342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146361604 + 96963409 = 12098^2 + 9847^2 .

It is a cyclic number.

It is not a de Polignac number, because 243325013 - 2² = 243325009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243325013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243327013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121662506 + 121662507.

It is an arithmetic number, because the mean of its divisors is an integer number (121662507).

Almost surely, 2^243325013 is an apocalyptic number.

It is an amenable number.

243325013 is a deficient number, since it is larger than the sum of its proper divisors (1).

243325013 is an equidigital number, since it uses as much as digits as its factorization.

243325013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 243325013 is about 15598.8785814878. The cubic root of 243325013 is about 624.3032346108.

Adding to 243325013 its reverse (310523342), we get a palindrome (553848355).

The spelling of 243325013 in words is "two hundred forty-three million, three hundred twenty-five thousand, thirteen".