218200648 has 8 divisors (see below), whose sum is σ = 409126230. Its totient is φ = 109100320.

The previous prime is 218200643. The next prime is 218200651. The reversal of 218200648 is 846002812.

It can be written as a sum of positive squares in only one way, i.e., 157703364 + 60497284 = 12558^2 + 7778^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×218200648² = 95223045575239808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (218200643) 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, 13637533 + ... + 13637548.

Almost surely, 2^218200648 is an apocalyptic number.

It is an amenable number.

218200648 is a deficient number, since it is larger than the sum of its proper divisors (190925582).

218200648 is a wasteful number, since it uses less digits than its factorization.

218200648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27275087 (or 27275083 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 218200648 is about 14771.6162961268. The cubic root of 218200648 is about 602.0307559994.

The spelling of 218200648 in words is "two hundred eighteen million, two hundred thousand, six hundred forty-eight".