12218293 has 4 divisors (see below), whose sum is σ = 12258400. Its totient is φ = 12178188.

The previous prime is 12218243. The next prime is 12218299. The reversal of 12218293 is 39281221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39281221 = 7 ⋅5611603.

It is a cyclic number.

It is not a de Polignac number, because 12218293 - 2¹³ = 12210101 is a prime.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12218299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19593 + ... + 20206.

It is an arithmetic number, because the mean of its divisors is an integer number (3064600).

Almost surely, 2^12218293 is an apocalyptic number.

It is an amenable number.

12218293 is a deficient number, since it is larger than the sum of its proper divisors (40107).

12218293 is an equidigital number, since it uses as much as digits as its factorization.

12218293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40106.

The product of its digits is 1728, while the sum is 28.

The square root of 12218293 is about 3495.4674937696. The cubic root of 12218293 is about 230.3227541833.

The spelling of 12218293 in words is "twelve million, two hundred eighteen thousand, two hundred ninety-three".