12219530 has 16 divisors (see below), whose sum is σ = 22464000. Its totient is φ = 4783632.

The previous prime is 12219523. The next prime is 12219533. The reversal of 12219530 is 3591221.

12219530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12219496 and 12219505.

It is not an unprimeable number, because it can be changed into a prime (12219533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12530 + ... + 13469.

It is an arithmetic number, because the mean of its divisors is an integer number (1404000).

Almost surely, 2^12219530 is an apocalyptic number.

12219530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12219530 is a deficient number, since it is larger than the sum of its proper divisors (10244470).

12219530 is a wasteful number, since it uses less digits than its factorization.

12219530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26053.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 12219530 is about 3495.6444327191. The cubic root of 12219530 is about 230.3305266720.

The spelling of 12219530 in words is "twelve million, two hundred nineteen thousand, five hundred thirty".