43243050013 has 2 divisors, whose sum is σ = 43243050014. Its totient is φ = 43243050012.

The previous prime is 43243050001. The next prime is 43243050031. The reversal of 43243050013 is 31005034234.

Together with next prime (43243050031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39950815129 + 3292234884 = 199877^2 + 57378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43243050013 is a prime.

It is a super-2 number, since 2×43243050013² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43243050013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43243050073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21621525006 + 21621525007.

It is an arithmetic number, because the mean of its divisors is an integer number (21621525007).

Almost surely, 2^43243050013 is an apocalyptic number.

It is an amenable number.

43243050013 is a deficient number, since it is larger than the sum of its proper divisors (1).

43243050013 is an equidigital number, since it uses as much as digits as its factorization.

43243050013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 43243050013 its reverse (31005034234), we get a palindrome (74248084247).

The spelling of 43243050013 in words is "forty-three billion, two hundred forty-three million, fifty thousand, thirteen".