6221548281 has 16 divisors (see below), whose sum is σ = 9025608704. Its totient is φ = 3789172224.

The previous prime is 6221548253. The next prime is 6221548339. The reversal of 6221548281 is 1828451226.

It is a happy number.

It is not a de Polignac number, because 6221548281 - 2⁶ = 6221548217 is a prime.

It is a super-2 number, since 2×6221548281² = 77415326025628109922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6221548981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 818521 + ... + 826086.

It is an arithmetic number, because the mean of its divisors is an integer number (564100544).

Almost surely, 2^6221548281 is an apocalyptic number.

It is an amenable number.

6221548281 is a deficient number, since it is larger than the sum of its proper divisors (2804060423).

6221548281 is a wasteful number, since it uses less digits than its factorization.

6221548281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644720.

The product of its digits is 61440, while the sum is 39.

The square root of 6221548281 is about 78876.7917767958. The cubic root of 6221548281 is about 1839.2163764017.

The spelling of 6221548281 in words is "six billion, two hundred twenty-one million, five hundred forty-eight thousand, two hundred eighty-one".