133448218 has 4 divisors (see below), whose sum is σ = 200172330. Its totient is φ = 66724108.

The previous prime is 133448137. The next prime is 133448243. The reversal of 133448218 is 812844331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812844331 = 13 ⋅62526487.

It can be written as a sum of positive squares in only one way, i.e., 106853569 + 26594649 = 10337^2 + 5157^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33362053 + ... + 33362056.

Almost surely, 2^133448218 is an apocalyptic number.

133448218 is a deficient number, since it is larger than the sum of its proper divisors (66724112).

133448218 is an equidigital number, since it uses as much as digits as its factorization.

133448218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66724111.

The product of its digits is 18432, while the sum is 34.

The square root of 133448218 is about 11551.9789646623. The cubic root of 133448218 is about 511.0196414799.

The spelling of 133448218 in words is "one hundred thirty-three million, four hundred forty-eight thousand, two hundred eighteen".