6311220 has 48 divisors (see below), whose sum is σ = 17781120. Its totient is φ = 1672576.

The previous prime is 6311219. The next prime is 6311251. The reversal of 6311220 is 221136.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 6311220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17401 + ... + 17759.

It is an arithmetic number, because the mean of its divisors is an integer number (370440).

Almost surely, 2^6311220 is an apocalyptic number.

6311220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6311220 is an abundant number, since it is smaller than the sum of its proper divisors (11469900).

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

6311220 is a wasteful number, since it uses less digits than its factorization.

6311220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 6311220 is about 2512.2141628452. The cubic root of 6311220 is about 184.8010522606.

Adding to 6311220 its reverse (221136), we get a palindrome (6532356).

The spelling of 6311220 in words is "six million, three hundred eleven thousand, two hundred twenty".