2005205245 has 16 divisors (see below), whose sum is σ = 2498720112. Its totient is φ = 1543587840.

The previous prime is 2005205221. The next prime is 2005205281. The reversal of 2005205245 is 5425025002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 241709209 + 1763496036 = 15547^2 + 41994^2 .

It is not a de Polignac number, because 2005205245 - 2¹⁷ = 2005074173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52032 + ... + 81961.

It is an arithmetic number, because the mean of its divisors is an integer number (156170007).

Almost surely, 2^2005205245 is an apocalyptic number.

It is an amenable number.

2005205245 is a deficient number, since it is larger than the sum of its proper divisors (493514867).

2005205245 is a wasteful number, since it uses less digits than its factorization.

2005205245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134112.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 2005205245 is about 44779.5181416683. The cubic root of 2005205245 is about 1261.0131359704.

The spelling of 2005205245 in words is "two billion, five million, two hundred five thousand, two hundred forty-five".