218012 has 6 divisors (see below), whose sum is σ = 381528. Its totient is φ = 109004.

The previous prime is 218003. The next prime is 218021. The reversal of 218012 is 210812.

It is an interprime number because it is at equal distance from previous prime (218003) and next prime (218021).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27248 + ... + 27255.

It is an arithmetic number, because the mean of its divisors is an integer number (63588).

2²¹⁸⁰¹² is an apocalyptic number.

It is an amenable number.

218012 is a deficient number, since it is larger than the sum of its proper divisors (163516).

218012 is a wasteful number, since it uses less digits than its factorization.

218012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54507 (or 54505 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 218012 is about 466.9175516084. The cubic root of 218012 is about 60.1857208327.

Adding to 218012 its reverse (210812), we get a palindrome (428824).

The spelling of 218012 in words is "two hundred eighteen thousand, twelve".