538218289 has 4 divisors (see below), whose sum is σ = 615106624. Its totient is φ = 461329956.

The previous prime is 538218287. The next prime is 538218293. The reversal of 538218289 is 982812835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 982812835 = 5 ⋅196562567.

It is a cyclic number.

It is not a de Polignac number, because 538218289 - 2¹ = 538218287 is a prime.

It is a super-2 number, since 2×538218289² = 579357853228175042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538218281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38444157 + ... + 38444170.

It is an arithmetic number, because the mean of its divisors is an integer number (153776656).

Almost surely, 2^538218289 is an apocalyptic number.

It is an amenable number.

538218289 is a deficient number, since it is larger than the sum of its proper divisors (76888335).

538218289 is an equidigital number, since it uses as much as digits as its factorization.

538218289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76888334.

The product of its digits is 276480, while the sum is 46.

The square root of 538218289 is about 23199.5320857986. The cubic root of 538218289 is about 813.4286856130.

The spelling of 538218289 in words is "five hundred thirty-eight million, two hundred eighteen thousand, two hundred eighty-nine".