42511000243 has 2 divisors, whose sum is σ = 42511000244. Its totient is φ = 42511000242.

The previous prime is 42511000219. The next prime is 42511000271. The reversal of 42511000243 is 34200011524.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42511000243 is a prime.

It is not a weakly prime, because it can be changed into another prime (42511007243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21255500121 + 21255500122.

It is an arithmetic number, because the mean of its divisors is an integer number (21255500122).

Almost surely, 2^42511000243 is an apocalyptic number.

42511000243 is a deficient number, since it is larger than the sum of its proper divisors (1).

42511000243 is an equidigital number, since it uses as much as digits as its factorization.

42511000243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 42511000243 its reverse (34200011524), we get a palindrome (76711011767).

The spelling of 42511000243 in words is "forty-two billion, five hundred eleven million, two hundred forty-three", and thus it is an aban number.