42200426581 has 2 divisors, whose sum is σ = 42200426582. Its totient is φ = 42200426580.

The previous prime is 42200426579. The next prime is 42200426617. The reversal of 42200426581 is 18562400224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39277294225 + 2923132356 = 198185^2 + 54066^2 .

It is a cyclic number.

It is not a de Polignac number, because 42200426581 - 2¹ = 42200426579 is a prime.

It is a super-2 number, since 2×42200426581² (a number of 22 digits) contains 22 as substring.

Together with 42200426579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42200423581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21100213290 + 21100213291.

It is an arithmetic number, because the mean of its divisors is an integer number (21100213291).

Almost surely, 2^42200426581 is an apocalyptic number.

It is an amenable number.

42200426581 is a deficient number, since it is larger than the sum of its proper divisors (1).

42200426581 is an equidigital number, since it uses as much as digits as its factorization.

42200426581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30720, while the sum is 34.

The spelling of 42200426581 in words is "forty-two billion, two hundred million, four hundred twenty-six thousand, five hundred eighty-one".