218122966 has 4 divisors (see below), whose sum is σ = 327184452. Its totient is φ = 109061482.

The previous prime is 218122963. The next prime is 218122979. The reversal of 218122966 is 669221812.

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

It is a super-3 number, since 3×218122966³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218122963) 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 as a sum of consecutive naturals, namely, 54530740 + ... + 54530743.

It is an arithmetic number, because the mean of its divisors is an integer number (81796113).

Almost surely, 2^218122966 is an apocalyptic number.

218122966 is a deficient number, since it is larger than the sum of its proper divisors (109061486).

218122966 is a wasteful number, since it uses less digits than its factorization.

218122966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109061485.

The product of its digits is 20736, while the sum is 37.

The square root of 218122966 is about 14768.9866273892. The cubic root of 218122966 is about 601.9593041735.

The spelling of 218122966 in words is "two hundred eighteen million, one hundred twenty-two thousand, nine hundred sixty-six".