68133218 has 8 divisors (see below), whose sum is σ = 103875420. Its totient is φ = 33508080.

The previous prime is 68133211. The next prime is 68133269. The reversal of 68133218 is 81233186.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 62047129 + 6086089 = 7877^2 + 2467^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (68133211) 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, 279113 + ... + 279356.

Almost surely, 2^68133218 is an apocalyptic number.

68133218 is a deficient number, since it is larger than the sum of its proper divisors (35742202).

68133218 is a wasteful number, since it uses less digits than its factorization.

68133218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558532.

The product of its digits is 6912, while the sum is 32.

The square root of 68133218 is about 8254.2848266824. The cubic root of 68133218 is about 408.4318804028.

Subtracting from 68133218 its sum of digits (32), we obtain a palindrome (68133186).

The spelling of 68133218 in words is "sixty-eight million, one hundred thirty-three thousand, two hundred eighteen".