12312226 has 4 divisors (see below), whose sum is σ = 18468342. Its totient is φ = 6156112.

The previous prime is 12312221. The next prime is 12312227. The reversal of 12312226 is 62221321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62221321 = 337 ⋅184633.

It can be written as a sum of positive squares in only one way, i.e., 12257001 + 55225 = 3501^2 + 235^2 .

It is a super-3 number, since 3×12312226³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12312221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3078055 + ... + 3078058.

Almost surely, 2^12312226 is an apocalyptic number.

12312226 is a deficient number, since it is larger than the sum of its proper divisors (6156116).

12312226 is an equidigital number, since it uses as much as digits as its factorization.

12312226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6156115.

The product of its digits is 288, while the sum is 19.

The square root of 12312226 is about 3508.8781683039. The cubic root of 12312226 is about 230.9114807355.

Adding to 12312226 its reverse (62221321), we get a palindrome (74533547).

The spelling of 12312226 in words is "twelve million, three hundred twelve thousand, two hundred twenty-six".