2115670813 has 2 divisors, whose sum is σ = 2115670814. Its totient is φ = 2115670812.

The previous prime is 2115670789. The next prime is 2115670867. The reversal of 2115670813 is 3180765112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1173610564 + 942060249 = 34258^2 + 30693^2 .

It is a cyclic number.

It is not a de Polignac number, because 2115670813 - 2²⁵ = 2082116381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2115670873) 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, 1057835406 + 1057835407.

It is an arithmetic number, because the mean of its divisors is an integer number (1057835407).

Almost surely, 2^2115670813 is an apocalyptic number.

It is an amenable number.

2115670813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115670813 is an equidigital number, since it uses as much as digits as its factorization.

2115670813 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 34.

The square root of 2115670813 is about 45996.4217412616. The cubic root of 2115670813 is about 1283.7566261766.

The spelling of 2115670813 in words is "two billion, one hundred fifteen million, six hundred seventy thousand, eight hundred thirteen".