2165071601213 has 2 divisors, whose sum is σ = 2165071601214. Its totient is φ = 2165071601212.

The previous prime is 2165071601159. The next prime is 2165071601279. The reversal of 2165071601213 is 3121061705612.

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., 2044493900164 + 120577701049 = 1429858^2 + 347243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2165071601213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165071601113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082535800606 + 1082535800607.

It is an arithmetic number, because the mean of its divisors is an integer number (1082535800607).

Almost surely, 2^{2165071601213} is an apocalyptic number.

It is an amenable number.

2165071601213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165071601213 is an equidigital number, since it uses as much as digits as its factorization.

2165071601213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 2165071601213 in words is "two trillion, one hundred sixty-five billion, seventy-one million, six hundred one thousand, two hundred thirteen".