42218545349 has 2 divisors, whose sum is σ = 42218545350. Its totient is φ = 42218545348.

The previous prime is 42218545309. The next prime is 42218545417. The reversal of 42218545349 is 94354581224.

42218545349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22939222849 + 19279322500 = 151457^2 + 138850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42218545349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42218545309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21109272674 + 21109272675.

It is an arithmetic number, because the mean of its divisors is an integer number (21109272675).

Almost surely, 2^42218545349 is an apocalyptic number.

It is an amenable number.

42218545349 is a deficient number, since it is larger than the sum of its proper divisors (1).

42218545349 is an equidigital number, since it uses as much as digits as its factorization.

42218545349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382400, while the sum is 47.

The spelling of 42218545349 in words is "forty-two billion, two hundred eighteen million, five hundred forty-five thousand, three hundred forty-nine".