43125013 has 2 divisors, whose sum is σ = 43125014. Its totient is φ = 43125012.

The previous prime is 43124993. The next prime is 43125031. The reversal of 43125013 is 31052134.

Together with next prime (43125031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43007364 + 117649 = 6558^2 + 343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43125013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43125113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21562506 + 21562507.

It is an arithmetic number, because the mean of its divisors is an integer number (21562507).

Almost surely, 2^43125013 is an apocalyptic number.

It is an amenable number.

43125013 is a deficient number, since it is larger than the sum of its proper divisors (1).

43125013 is an equidigital number, since it uses as much as digits as its factorization.

43125013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 43125013 is about 6566.9637580849. The cubic root of 43125013 is about 350.6789894123.

Adding to 43125013 its reverse (31052134), we get a palindrome (74177147).

The spelling of 43125013 in words is "forty-three million, one hundred twenty-five thousand, thirteen".