12220554 has 16 divisors (see below), whose sum is σ = 24504480. Its totient is φ = 4062960.

The previous prime is 12220543. The next prime is 12220561. The reversal of 12220554 is 45502221.

It is a happy number.

12220554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12220554.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84 + ... + 4944.

It is an arithmetic number, because the mean of its divisors is an integer number (1531530).

Almost surely, 2^12220554 is an apocalyptic number.

12220554 is an abundant number, since it is smaller than the sum of its proper divisors (12283926).

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

12220554 is a wasteful number, since it uses less digits than its factorization.

12220554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 12220554 is about 3495.7908976368. The cubic root of 12220554 is about 230.3369604130.

Adding to 12220554 its reverse (45502221), we get a palindrome (57722775).

The spelling of 12220554 in words is "twelve million, two hundred twenty thousand, five hundred fifty-four".