2821442249 has 4 divisors (see below), whose sum is σ = 2822399364. Its totient is φ = 2820485136.

The previous prime is 2821442207. The next prime is 2821442251. The reversal of 2821442249 is 9422441282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9422441282 = 2 ⋅4711220641.

It can be written as a sum of positive squares in 2 ways, for example, as 278055625 + 2543386624 = 16675^2 + 50432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2821442249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2821442279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474122 + ... + 480035.

It is an arithmetic number, because the mean of its divisors is an integer number (705599841).

Almost surely, 2^2821442249 is an apocalyptic number.

It is an amenable number.

2821442249 is a deficient number, since it is larger than the sum of its proper divisors (957115).

2821442249 is an equidigital number, since it uses as much as digits as its factorization.

2821442249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957114.

The product of its digits is 73728, while the sum is 38.

The square root of 2821442249 is about 53117.2500135314. The cubic root of 2821442249 is about 1413.0484568021.

The spelling of 2821442249 in words is "two billion, eight hundred twenty-one million, four hundred forty-two thousand, two hundred forty-nine".