6172218 has 36 divisors (see below), whose sum is σ = 14488110. Its totient is φ = 1898208.

The previous prime is 6172217. The next prime is 6172247. The reversal of 6172218 is 8122716.

It can be written as a sum of positive squares in 3 ways, for example, as 5076009 + 1096209 = 2253^2 + 1047^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6172191 and 6172200.

It is not an unprimeable number, because it can be changed into a prime (6172213) 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 17 ways as a sum of consecutive naturals, for example, 2028 + ... + 4056.

Almost surely, 2^6172218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6172218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7244055).

6172218 is an abundant number, since it is smaller than the sum of its proper divisors (8315892).

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

6172218 is a wasteful number, since it uses less digits than its factorization.

6172218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063 (or 2047 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 6172218 is about 2484.3948961467. The cubic root of 6172218 is about 183.4342460052.

The spelling of 6172218 in words is "six million, one hundred seventy-two thousand, two hundred eighteen".