2181613279 has 2 divisors, whose sum is σ = 2181613280. Its totient is φ = 2181613278.

The previous prime is 2181613261. The next prime is 2181613289. The reversal of 2181613279 is 9723161812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2181613279 - 2²³ = 2173224671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2181613219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090806639 + 1090806640.

It is an arithmetic number, because the mean of its divisors is an integer number (1090806640).

Almost surely, 2^2181613279 is an apocalyptic number.

2181613279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181613279 is an equidigital number, since it uses as much as digits as its factorization.

2181613279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The square root of 2181613279 is about 46707.7432445628. The cubic root of 2181613279 is about 1296.9580312051.

The spelling of 2181613279 in words is "two billion, one hundred eighty-one million, six hundred thirteen thousand, two hundred seventy-nine".