42173556241 has 2 divisors, whose sum is σ = 42173556242. Its totient is φ = 42173556240.

The previous prime is 42173556239. The next prime is 42173556251. The reversal of 42173556241 is 14265537124.

42173556241 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., 21637233216 + 20536323025 = 147096^2 + 143305^2 .

It is a cyclic number.

It is not a de Polignac number, because 42173556241 - 2¹ = 42173556239 is a prime.

Together with 42173556239, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42173556194 and 42173556203.

It is not a weakly prime, because it can be changed into another prime (42173556251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21086778120 + 21086778121.

It is an arithmetic number, because the mean of its divisors is an integer number (21086778121).

Almost surely, 2^42173556241 is an apocalyptic number.

It is an amenable number.

42173556241 is a deficient number, since it is larger than the sum of its proper divisors (1).

42173556241 is an equidigital number, since it uses as much as digits as its factorization.

42173556241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 40.

The spelling of 42173556241 in words is "forty-two billion, one hundred seventy-three million, five hundred fifty-six thousand, two hundred forty-one".