12213630 has 144 divisors (see below), whose sum is σ = 38025936. Its totient is φ = 2695680.

The previous prime is 12213629. The next prime is 12213647. The reversal of 12213630 is 3631221.

12213630 is a `hidden beast` number, since 1 + 22 + 13 + 630 = 666.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 167274 + ... + 167346.

It is an arithmetic number, because the mean of its divisors is an integer number (264069).

Almost surely, 2^12213630 is an apocalyptic number.

12213630 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 12213630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19012968).

12213630 is an abundant number, since it is smaller than the sum of its proper divisors (25812306).

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

12213630 is a wasteful number, since it uses less digits than its factorization.

12213630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 12213630 is about 3494.8004234863. The cubic root of 12213630 is about 230.2934502629.

Adding to 12213630 its reverse (3631221), we get a palindrome (15844851).

It can be divided in two parts, 1221 and 3630, that added together give a triangular number (4851 = T₉₈).

The spelling of 12213630 in words is "twelve million, two hundred thirteen thousand, six hundred thirty".