2005405511 has 2 divisors, whose sum is σ = 2005405512. Its totient is φ = 2005405510.

The previous prime is 2005405433. The next prime is 2005405529. The reversal of 2005405511 is 1155045002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2005405511 - 2¹⁸ = 2005143367 is a prime.

It is a super-2 number, since 2×2005405511² = 8043302527098342242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2005455511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002702755 + 1002702756.

It is an arithmetic number, because the mean of its divisors is an integer number (1002702756).

Almost surely, 2^2005405511 is an apocalyptic number.

2005405511 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005405511 is an equidigital number, since it uses as much as digits as its factorization.

2005405511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 2005405511 is about 44781.7542197712. The cubic root of 2005405511 is about 1261.0551149899.

The spelling of 2005405511 in words is "two billion, five million, four hundred five thousand, five hundred eleven".