6221144 has 8 divisors (see below), whose sum is σ = 11664660. Its totient is φ = 3110568.

The previous prime is 6221123. The next prime is 6221147. The reversal of 6221144 is 4411226.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-4 number, since 4×6221144⁴ (a number of 28 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388814 + ... + 388829.

Almost surely, 2^6221144 is an apocalyptic number.

It is an amenable number.

6221144 is a deficient number, since it is larger than the sum of its proper divisors (5443516).

6221144 is a wasteful number, since it uses less digits than its factorization.

6221144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777649 (or 777645 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 6221144 is about 2494.2221232280. Note that the first 3 decimals coincide. The cubic root of 6221144 is about 183.9176537640.

The spelling of 6221144 in words is "six million, two hundred twenty-one thousand, one hundred forty-four".