1050005055581 has 2 divisors, whose sum is σ = 1050005055582. Its totient is φ = 1050005055580.

The previous prime is 1050005055553. The next prime is 1050005055647. The reversal of 1050005055581 is 1855505000501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635193060100 + 414811995481 = 796990^2 + 644059^2 .

It is an emirp because it is prime and its reverse (1855505000501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1050005055581 - 2³⁴ = 1032825186397 is a prime.

It is a super-2 number, since 2×1050005055581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1050005055511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525002527790 + 525002527791.

It is an arithmetic number, because the mean of its divisors is an integer number (525002527791).

Almost surely, 2^{1050005055581} is an apocalyptic number.

It is an amenable number.

1050005055581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1050005055581 is an equidigital number, since it uses as much as digits as its factorization.

1050005055581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25000, while the sum is 35.

The spelling of 1050005055581 in words is "one trillion, fifty billion, five million, fifty-five thousand, five hundred eighty-one".