6221100 has 72 divisors (see below), whose sum is σ = 18280080. Its totient is φ = 1633280.

The previous prime is 6221093. The next prime is 6221101. The reversal of 6221100 is 11226.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6221101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26584 + ... + 26816.

It is an arithmetic number, because the mean of its divisors is an integer number (253890).

Almost surely, 2^6221100 is an apocalyptic number.

6221100 is a gapful number since it is divisible by the number (60) 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 6221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9140040).

6221100 is an abundant number, since it is smaller than the sum of its proper divisors (12058980).

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

6221100 is a wasteful number, since it uses less digits than its factorization.

6221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 6221100 is about 2494.2133028272. The cubic root of 6221100 is about 183.9172201676.

Adding to 6221100 its reverse (11226), we get a palindrome (6232326).

The spelling of 6221100 in words is "six million, two hundred twenty-one thousand, one hundred".