12218250 has 64 divisors (see below), whose sum is σ = 33291648. Its totient is φ = 2960000.

The previous prime is 12218243. The next prime is 12218299. The reversal of 12218250 is 5281221.

It is a happy number.

12218250 is nontrivially palindromic in base 7.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7510 + ... + 8990.

It is an arithmetic number, because the mean of its divisors is an integer number (520182).

Almost surely, 2^12218250 is an apocalyptic number.

12218250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12218250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16645824).

12218250 is an abundant number, since it is smaller than the sum of its proper divisors (21073398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12218250 is a wasteful number, since it uses less digits than its factorization.

12218250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512 (or 1502 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 12218250 is about 3495.4613429417. The cubic root of 12218250 is about 230.3224839904.

Adding to 12218250 its reverse (5281221), we get a palindrome (17499471).

The spelling of 12218250 in words is "twelve million, two hundred eighteen thousand, two hundred fifty".