42830409581 has 2 divisors, whose sum is σ = 42830409582. Its totient is φ = 42830409580.

The previous prime is 42830409571. The next prime is 42830409619. The reversal of 42830409581 is 18590403824.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39734043556 + 3096366025 = 199334^2 + 55645^2 .

It is a cyclic number.

It is not a de Polignac number, because 42830409581 - 2²² = 42826215277 is a prime.

It is a super-2 number, since 2×42830409581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42830409511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21415204790 + 21415204791.

It is an arithmetic number, because the mean of its divisors is an integer number (21415204791).

Almost surely, 2^42830409581 is an apocalyptic number.

It is an amenable number.

42830409581 is a deficient number, since it is larger than the sum of its proper divisors (1).

42830409581 is an equidigital number, since it uses as much as digits as its factorization.

42830409581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 42830409581 in words is "forty-two billion, eight hundred thirty million, four hundred nine thousand, five hundred eighty-one".