1544221224 has 192 divisors, whose sum is σ = 5176429440. Its totient is φ = 404974080.

The previous prime is 1544221223. The next prime is 1544221243. The reversal of 1544221224 is 4221224451.

It is a happy number.

1544221224 is a `hidden beast` number, since 1 + 5 + 442 + 212 + 2 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (1544221223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1381914 + ... + 1383030.

It is an arithmetic number, because the mean of its divisors is an integer number (26960570).

Almost surely, 2^1544221224 is an apocalyptic number.

1544221224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1544221224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2588214720).

1544221224 is an abundant number, since it is smaller than the sum of its proper divisors (3632208216).

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

1544221224 is a wasteful number, since it uses less digits than its factorization.

1544221224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 1353 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 1544221224 is about 39296.5803092330. The cubic root of 1544221224 is about 1155.8545112896.

Adding to 1544221224 its reverse (4221224451), we get a palindrome (5765445675).

The spelling of 1544221224 in words is "one billion, five hundred forty-four million, two hundred twenty-one thousand, two hundred twenty-four".