2172352813 has 2 divisors, whose sum is σ = 2172352814. Its totient is φ = 2172352812.

The previous prime is 2172352811. The next prime is 2172352873. The reversal of 2172352813 is 3182532712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2062794724 + 109558089 = 45418^2 + 10467^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172352813 - 2¹ = 2172352811 is a prime.

Together with 2172352811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172352811) 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 as a sum of consecutive naturals, namely, 1086176406 + 1086176407.

It is an arithmetic number, because the mean of its divisors is an integer number (1086176407).

Almost surely, 2^2172352813 is an apocalyptic number.

It is an amenable number.

2172352813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172352813 is an equidigital number, since it uses as much as digits as its factorization.

2172352813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 2172352813 is about 46608.5058009801. The cubic root of 2172352813 is about 1295.1203285078.

The spelling of 2172352813 in words is "two billion, one hundred seventy-two million, three hundred fifty-two thousand, eight hundred thirteen".