42543697211 has 2 divisors, whose sum is σ = 42543697212. Its totient is φ = 42543697210.

The previous prime is 42543697171. The next prime is 42543697237. The reversal of 42543697211 is 11279634524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42543697211 is a prime.

It is not a weakly prime, because it can be changed into another prime (42543697811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271848605 + 21271848606.

It is an arithmetic number, because the mean of its divisors is an integer number (21271848606).

Almost surely, 2^42543697211 is an apocalyptic number.

42543697211 is a deficient number, since it is larger than the sum of its proper divisors (1).

42543697211 is an equidigital number, since it uses as much as digits as its factorization.

42543697211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The spelling of 42543697211 in words is "forty-two billion, five hundred forty-three million, six hundred ninety-seven thousand, two hundred eleven".