2821131879 has 16 divisors (see below), whose sum is σ = 3829356000. Its totient is φ = 1847115776.

The previous prime is 2821131877. The next prime is 2821131881. The reversal of 2821131879 is 9781311282.

It is an interprime number because it is at equal distance from previous prime (2821131877) and next prime (2821131881).

It is a cyclic number.

It is not a de Polignac number, because 2821131879 - 2¹ = 2821131877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2821131879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821131871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4327 + ... + 75239.

It is an arithmetic number, because the mean of its divisors is an integer number (239334750).

Almost surely, 2^2821131879 is an apocalyptic number.

2821131879 is a deficient number, since it is larger than the sum of its proper divisors (1008224121).

2821131879 is a wasteful number, since it uses less digits than its factorization.

2821131879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71154.

The product of its digits is 48384, while the sum is 42.

The square root of 2821131879 is about 53114.3283775668. The cubic root of 2821131879 is about 1412.9966412301.

The spelling of 2821131879 in words is "two billion, eight hundred twenty-one million, one hundred thirty-one thousand, eight hundred seventy-nine".