2005155512 has 16 divisors (see below), whose sum is σ = 3851366400. Its totient is φ = 978124480.

The previous prime is 2005155511. The next prime is 2005155521. The reversal of 2005155512 is 2155515002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005155511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3056312 + ... + 3056967.

It is an arithmetic number, because the mean of its divisors is an integer number (240710400).

Almost surely, 2^2005155512 is an apocalyptic number.

It is an amenable number.

2005155512 is a deficient number, since it is larger than the sum of its proper divisors (1846210888).

2005155512 is a wasteful number, since it uses less digits than its factorization.

2005155512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6113326 (or 6113322 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 2005155512 is about 44778.9628285426. The cubic root of 2005155512 is about 1261.0027106894.

The spelling of 2005155512 in words is "two billion, five million, one hundred fifty-five thousand, five hundred twelve".