6540222 has 32 divisors (see below), whose sum is σ = 14192640. Its totient is φ = 1997280.

The previous prime is 6540217. The next prime is 6540239. The reversal of 6540222 is 2220456.

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, 14679 + ... + 15117.

It is an arithmetic number, because the mean of its divisors is an integer number (443520).

Almost surely, 2^6540222 is an apocalyptic number.

6540222 is an abundant number, since it is smaller than the sum of its proper divisors (7652418).

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

6540222 is a wasteful number, since it uses less digits than its factorization.

6540222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 6540222 is about 2557.3857745753. The cubic root of 6540222 is about 187.0097128607.

Adding to 6540222 its reverse (2220456), we get a palindrome (8760678).

The spelling of 6540222 in words is "six million, five hundred forty thousand, two hundred twenty-two".