42143460209 has 2 divisors, whose sum is σ = 42143460210. Its totient is φ = 42143460208.

The previous prime is 42143460181. The next prime is 42143460263. The reversal of 42143460209 is 90206434124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21814403809 + 20329056400 = 147697^2 + 142580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42143460209 is a prime.

It is not a weakly prime, because it can be changed into another prime (42143469209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21071730104 + 21071730105.

It is an arithmetic number, because the mean of its divisors is an integer number (21071730105).

Almost surely, 2^42143460209 is an apocalyptic number.

It is an amenable number.

42143460209 is a deficient number, since it is larger than the sum of its proper divisors (1).

42143460209 is an equidigital number, since it uses as much as digits as its factorization.

42143460209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 42143460209 in words is "forty-two billion, one hundred forty-three million, four hundred sixty thousand, two hundred nine".