42424344217 has 2 divisors, whose sum is σ = 42424344218. Its totient is φ = 42424344216.

The previous prime is 42424344113. The next prime is 42424344257. The reversal of 42424344217 is 71244342424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26976091536 + 15448252681 = 164244^2 + 124291^2 .

It is a cyclic number.

It is not a de Polignac number, because 42424344217 - 2⁷ = 42424344089 is a prime.

It is not a weakly prime, because it can be changed into another prime (42424344257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21212172108 + 21212172109.

It is an arithmetic number, because the mean of its divisors is an integer number (21212172109).

Almost surely, 2^42424344217 is an apocalyptic number.

It is an amenable number.

42424344217 is a deficient number, since it is larger than the sum of its proper divisors (1).

42424344217 is an equidigital number, since it uses as much as digits as its factorization.

42424344217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 37.

The spelling of 42424344217 in words is "forty-two billion, four hundred twenty-four million, three hundred forty-four thousand, two hundred seventeen".