102218 has 4 divisors (see below), whose sum is σ = 153330. Its totient is φ = 51108.

The previous prime is 102217. The next prime is 102229. The reversal of 102218 is 812201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812201 = 13 ⋅62477.

It can be written as a sum of positive squares in only one way, i.e., 61009 + 41209 = 247^2 + 203^2 .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 102218.

It is not an unprimeable number, because it can be changed into a prime (102217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25553 + ... + 25556.

2¹⁰²²¹⁸ is an apocalyptic number.

102218 is a deficient number, since it is larger than the sum of its proper divisors (51112).

102218 is an equidigital number, since it uses as much as digits as its factorization.

102218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51111.

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

The square root of 102218 is about 319.7154985296. The cubic root of 102218 is about 46.7565501227.

Adding to 102218 its reverse (812201), we get a palindrome (914419).

The spelling of 102218 in words is "one hundred two thousand, two hundred eighteen".