2013645217 has 2 divisors, whose sum is σ = 2013645218. Its totient is φ = 2013645216.

The previous prime is 2013645209. The next prime is 2013645281. The reversal of 2013645217 is 7125463102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1517959521 + 495685696 = 38961^2 + 22264^2 .

It is a cyclic number.

It is not a de Polignac number, because 2013645217 - 2³ = 2013645209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2013645287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006822608 + 1006822609.

It is an arithmetic number, because the mean of its divisors is an integer number (1006822609).

Almost surely, 2^2013645217 is an apocalyptic number.

It is an amenable number.

2013645217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2013645217 is an equidigital number, since it uses as much as digits as its factorization.

2013645217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2013645217 is about 44873.6583866303. The cubic root of 2013645217 is about 1262.7798741937.

The spelling of 2013645217 in words is "two billion, thirteen million, six hundred forty-five thousand, two hundred seventeen".