12220543 has 2 divisors, whose sum is σ = 12220544. Its totient is φ = 12220542.

The previous prime is 12220531. The next prime is 12220561. The reversal of 12220543 is 34502221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12220543 - 2⁹ = 12220031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12220543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110271 + 6110272.

It is an arithmetic number, because the mean of its divisors is an integer number (6110272).

Almost surely, 2^12220543 is an apocalyptic number.

12220543 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220543 is an equidigital number, since it uses as much as digits as its factorization.

12220543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 12220543 is about 3495.7893243158. The cubic root of 12220543 is about 230.3368913024.

Adding to 12220543 its reverse (34502221), we get a palindrome (46722764).

The spelling of 12220543 in words is "twelve million, two hundred twenty thousand, five hundred forty-three".