12351222 has 24 divisors (see below), whose sum is σ = 28820064. Its totient is φ = 3800304.

The previous prime is 12351221. The next prime is 12351223. The reversal of 12351222 is 22215321.

It is an interprime number because it is at equal distance from previous prime (12351221) and next prime (12351223).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12351195 and 12351204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12351221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26158 + ... + 26625.

It is an arithmetic number, because the mean of its divisors is an integer number (1200836).

Almost surely, 2^12351222 is an apocalyptic number.

12351222 is an abundant number, since it is smaller than the sum of its proper divisors (16468842).

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

12351222 is a wasteful number, since it uses less digits than its factorization.

12351222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52804 (or 52801 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 12351222 is about 3514.4305370856. The cubic root of 12351222 is about 231.1550092450.

Adding to 12351222 its reverse (22215321), we get a palindrome (34566543).

The spelling of 12351222 in words is "twelve million, three hundred fifty-one thousand, two hundred twenty-two".