218065226 has 4 divisors (see below), whose sum is σ = 327097842. Its totient is φ = 109032612.

The previous prime is 218065193. The next prime is 218065241. The reversal of 218065226 is 622560812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 197824225 + 20241001 = 14065^2 + 4499^2 .

It is a junction number, because it is equal to n+sod(n) for n = 218065192 and 218065201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54516305 + ... + 54516308.

Almost surely, 2^218065226 is an apocalyptic number.

218065226 is a deficient number, since it is larger than the sum of its proper divisors (109032616).

218065226 is a wasteful number, since it uses less digits than its factorization.

218065226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109032615.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 218065226 is about 14767.0317261121. The cubic root of 218065226 is about 601.9061839875.

The spelling of 218065226 in words is "two hundred eighteen million, sixty-five thousand, two hundred twenty-six".