42821559041 has 2 divisors, whose sum is σ = 42821559042. Its totient is φ = 42821559040.

The previous prime is 42821559023. The next prime is 42821559061. The reversal of 42821559041 is 14095512824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42590640625 + 230918416 = 206375^2 + 15196^2 .

It is a cyclic number.

It is not a de Polignac number, because 42821559041 - 2¹⁸ = 42821296897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42821559041.

It is not a weakly prime, because it can be changed into another prime (42821559061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21410779520 + 21410779521.

It is an arithmetic number, because the mean of its divisors is an integer number (21410779521).

Almost surely, 2^42821559041 is an apocalyptic number.

It is an amenable number.

42821559041 is a deficient number, since it is larger than the sum of its proper divisors (1).

42821559041 is an equidigital number, since it uses as much as digits as its factorization.

42821559041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 41.

The spelling of 42821559041 in words is "forty-two billion, eight hundred twenty-one million, five hundred fifty-nine thousand, forty-one".