218202812 has 12 divisors (see below), whose sum is σ = 390735576. Its totient is φ = 106564080.

The previous prime is 218202799. The next prime is 218202841.

218202812 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×218202812² = 95224934329414688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 634139 + ... + 634482.

It is an arithmetic number, because the mean of its divisors is an integer number (32561298).

Almost surely, 2^218202812 is an apocalyptic number.

It is an amenable number.

218202812 is a deficient number, since it is larger than the sum of its proper divisors (172532764).

218202812 is a wasteful number, since it uses less digits than its factorization.

218202812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268668 (or 1268666 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 218202812 is about 14771.6895445308. The cubic root of 218202812 is about 602.0327462016.

The spelling of 218202812 in words is "two hundred eighteen million, two hundred two thousand, eight hundred twelve".