2218653449 has 4 divisors (see below), whose sum is σ = 2249046036. Its totient is φ = 2188260864.

The previous prime is 2218653397. The next prime is 2218653461. The reversal of 2218653449 is 9443568122.

2218653449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1113423424 + 1105230025 = 33368^2 + 33245^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218653449 - 2¹² = 2218649353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2218655449) 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, 15196184 + ... + 15196329.

It is an arithmetic number, because the mean of its divisors is an integer number (562261509).

Almost surely, 2^2218653449 is an apocalyptic number.

It is an amenable number.

2218653449 is a deficient number, since it is larger than the sum of its proper divisors (30392587).

2218653449 is an equidigital number, since it uses as much as digits as its factorization.

2218653449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30392586.

The product of its digits is 414720, while the sum is 44.

The square root of 2218653449 is about 47102.5843133899. The cubic root of 2218653449 is about 1304.2569423630.

The spelling of 2218653449 in words is "two billion, two hundred eighteen million, six hundred fifty-three thousand, four hundred forty-nine".