2005511345 has 8 divisors (see below), whose sum is σ = 2411065320. Its totient is φ = 1601441280.

The previous prime is 2005511317. The next prime is 2005511359. The reversal of 2005511345 is 5431155002.

It can be written as a sum of positive squares in 4 ways, for example, as 2411809 + 2003099536 = 1553^2 + 44756^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2005511345 - 2¹⁰ = 2005510321 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 368000 + ... + 373409.

It is an arithmetic number, because the mean of its divisors is an integer number (301383165).

Almost surely, 2^2005511345 is an apocalyptic number.

It is an amenable number.

2005511345 is a deficient number, since it is larger than the sum of its proper divisors (405553975).

2005511345 is an equidigital number, since it uses as much as digits as its factorization.

2005511345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741955.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2005511345 is about 44782.9358684756. The cubic root of 2005511345 is about 1261.0772983934.

Adding to 2005511345 its reverse (5431155002), we get a palindrome (7436666347).

The spelling of 2005511345 in words is "two billion, five million, five hundred eleven thousand, three hundred forty-five".