42608442281 has 4 divisors (see below), whose sum is σ = 42614524932. Its totient is φ = 42602359632.

The previous prime is 42608442257. The next prime is 42608442307. The reversal of 42608442281 is 18224480624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19286265625 + 23322176656 = 138875^2 + 152716^2 .

It is a cyclic number.

It is not a de Polignac number, because 42608442281 - 2¹⁴ = 42608425897 is a prime.

It is a super-2 number, since 2×42608442281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42608442251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030806 + ... + 3044831.

It is an arithmetic number, because the mean of its divisors is an integer number (10653631233).

Almost surely, 2^42608442281 is an apocalyptic number.

It is an amenable number.

42608442281 is a deficient number, since it is larger than the sum of its proper divisors (6082651).

42608442281 is an equidigital number, since it uses as much as digits as its factorization.

42608442281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6082650.

The product of its (nonzero) digits is 196608, while the sum is 41.

The spelling of 42608442281 in words is "forty-two billion, six hundred eight million, four hundred forty-two thousand, two hundred eighty-one".