2045545213 has 4 divisors (see below), whose sum is σ = 2165871420. Its totient is φ = 1925219008.

The previous prime is 2045545171. The next prime is 2045545283. The reversal of 2045545213 is 3125455402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1497844804 + 547700409 = 38702^2 + 23403^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045545213 - 2¹⁷ = 2045414141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045545283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60163078 + ... + 60163111.

It is an arithmetic number, because the mean of its divisors is an integer number (541467855).

Almost surely, 2^2045545213 is an apocalyptic number.

It is an amenable number.

2045545213 is a deficient number, since it is larger than the sum of its proper divisors (120326207).

2045545213 is a wasteful number, since it uses less digits than its factorization.

2045545213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120326206.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 2045545213 is about 45227.7040429867. The cubic root of 2045545213 is about 1269.4132518073.

The spelling of 2045545213 in words is "two billion, forty-five million, five hundred forty-five thousand, two hundred thirteen".