2005155 has 20 divisors (see below), whose sum is σ = 3595152. Its totient is φ = 1069200.

The previous prime is 2005151. The next prime is 2005181. The reversal of 2005155 is 5515002.

It is not a de Polignac number, because 2005155 - 2² = 2005151 is a prime.

2005155 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2005151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2071 + ... + 2880.

2^2005155 is an apocalyptic number.

2005155 is a deficient number, since it is larger than the sum of its proper divisors (1589997).

2005155 is an equidigital number, since it uses as much as digits as its factorization.

2005155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4968 (or 4959 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 2005155 is about 1416.0349571956. The cubic root of 2005155 is about 126.1002603360.

The spelling of 2005155 in words is "two million, five thousand, one hundred fifty-five".