218312152 has 16 divisors (see below), whose sum is σ = 410456160. Its totient is φ = 108857184.

The previous prime is 218312123. The next prime is 218312189. The reversal of 218312152 is 251213812.

It is a super-2 number, since 2×218312152² = 95320391421742208, 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34243 + ... + 40114.

It is an arithmetic number, because the mean of its divisors is an integer number (25653510).

Almost surely, 2^218312152 is an apocalyptic number.

It is an amenable number.

218312152 is a deficient number, since it is larger than the sum of its proper divisors (192144008).

218312152 is a wasteful number, since it uses less digits than its factorization.

218312152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74730 (or 74726 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 218312152 is about 14775.3900794531. The cubic root of 218312152 is about 602.1332876320.

Adding to 218312152 its reverse (251213812), we get a palindrome (469525964).

The spelling of 218312152 in words is "two hundred eighteen million, three hundred twelve thousand, one hundred fifty-two".