218470564 has 12 divisors (see below), whose sum is σ = 411733084. Its totient is φ = 100832544.

The previous prime is 218470561. The next prime is 218470579. The reversal of 218470564 is 465074812.

It can be written as a sum of positive squares in 2 ways, for example, as 111513600 + 106956964 = 10560^2 + 10342^2 .

It is not an unprimeable number, because it can be changed into a prime (218470561) 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 in 3 ways as a sum of consecutive naturals, for example, 2100627 + ... + 2100730.

Almost surely, 2^218470564 is an apocalyptic number.

It is an amenable number.

218470564 is a deficient number, since it is larger than the sum of its proper divisors (193262520).

218470564 is a wasteful number, since it uses less digits than its factorization.

218470564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201374 (or 4201372 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 218470564 is about 14780.7497780052. The cubic root of 218470564 is about 602.2788927142.

The spelling of 218470564 in words is "two hundred eighteen million, four hundred seventy thousand, five hundred sixty-four".