68205218 has 8 divisors (see below), whose sum is σ = 103213548. Its totient is φ = 33800704.

The previous prime is 68205217. The next prime is 68205251. The reversal of 68205218 is 81250286.

It can be written as a sum of positive squares in 2 ways, for example, as 65885689 + 2319529 = 8117^2 + 1523^2 .

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 (68205217) 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, 150671 + ... + 151122.

Almost surely, 2^68205218 is an apocalyptic number.

68205218 is a deficient number, since it is larger than the sum of its proper divisors (35008330).

68205218 is a wasteful number, since it uses less digits than its factorization.

68205218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301908.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 68205218 is about 8258.6450462530. The cubic root of 68205218 is about 408.5757003272.

The spelling of 68205218 in words is "sixty-eight million, two hundred five thousand, two hundred eighteen".