128218322 has 4 divisors (see below), whose sum is σ = 192327486. Its totient is φ = 64109160.

The previous prime is 128218313. The next prime is 128218331. The reversal of 128218322 is 223812821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 223812821 = 337 ⋅664133.

It is an interprime number because it is at equal distance from previous prime (128218313) and next prime (128218331).

It can be written as a sum of positive squares in only one way, i.e., 99820081 + 28398241 = 9991^2 + 5329^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32054579 + ... + 32054582.

Almost surely, 2^128218322 is an apocalyptic number.

128218322 is a deficient number, since it is larger than the sum of its proper divisors (64109164).

128218322 is an equidigital number, since it uses as much as digits as its factorization.

128218322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64109163.

The product of its digits is 3072, while the sum is 29.

The square root of 128218322 is about 11323.3529486632. The cubic root of 128218322 is about 504.2547868769.

The spelling of 128218322 in words is "one hundred twenty-eight million, two hundred eighteen thousand, three hundred twenty-two".