2282721449 has 4 divisors (see below), whose sum is σ = 2289188436. Its totient is φ = 2276254464.

The previous prime is 2282721421. The next prime is 2282721479. The reversal of 2282721449 is 9441272822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9441272822 = 2 ⋅4720636411.

It can be written as a sum of positive squares in 2 ways, for example, as 1169298025 + 1113423424 = 34195^2 + 33368^2 .

It is a cyclic number.

It is not a de Polignac number, because 2282721449 - 2²⁸ = 2014285993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2282721479) 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, 3232964 + ... + 3233669.

It is an arithmetic number, because the mean of its divisors is an integer number (572297109).

Almost surely, 2^2282721449 is an apocalyptic number.

It is an amenable number.

2282721449 is a deficient number, since it is larger than the sum of its proper divisors (6466987).

2282721449 is an equidigital number, since it uses as much as digits as its factorization.

2282721449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6466986.

The product of its digits is 129024, while the sum is 41.

The square root of 2282721449 is about 47777.8342853671. The cubic root of 2282721449 is about 1316.6923324449.

The spelling of 2282721449 in words is "two billion, two hundred eighty-two million, seven hundred twenty-one thousand, four hundred forty-nine".