6221544 has 64 divisors (see below), whose sum is σ = 18403200. Its totient is φ = 1714944.

The previous prime is 6221543. The next prime is 6221549. The reversal of 6221544 is 4451226.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (6221543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4234 + ... + 5510.

It is an arithmetic number, because the mean of its divisors is an integer number (287550).

Almost surely, 2^6221544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6221544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9201600).

6221544 is an abundant number, since it is smaller than the sum of its proper divisors (12181656).

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

6221544 is a wasteful number, since it uses less digits than its factorization.

6221544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322 (or 1318 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 6221544 is about 2494.3023072595. The cubic root of 6221544 is about 183.9215954551.

The spelling of 6221544 in words is "six million, two hundred twenty-one thousand, five hundred forty-four".