232540013 has 2 divisors, whose sum is σ = 232540014. Its totient is φ = 232540012.

The previous prime is 232539977. The next prime is 232540043. The reversal of 232540013 is 310045232.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134490409 + 98049604 = 11597^2 + 9902^2 .

It is a cyclic number.

It is not a de Polignac number, because 232540013 - 2¹² = 232535917 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232540043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116270006 + 116270007.

It is an arithmetic number, because the mean of its divisors is an integer number (116270007).

Almost surely, 2^232540013 is an apocalyptic number.

It is an amenable number.

232540013 is a deficient number, since it is larger than the sum of its proper divisors (1).

232540013 is an equidigital number, since it uses as much as digits as its factorization.

232540013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 232540013 is about 15249.2627034883. The cubic root of 232540013 is about 614.9397460082.

Adding to 232540013 its reverse (310045232), we get a palindrome (542585245).

The spelling of 232540013 in words is "two hundred thirty-two million, five hundred forty thousand, thirteen".