6540216 has 32 divisors (see below), whose sum is σ = 16578960. Its totient is φ = 2149632.

The previous prime is 6540187. The next prime is 6540217. The reversal of 6540216 is 6120456.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540217) 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 7 ways as a sum of consecutive naturals, for example, 115 + ... + 3618.

Almost surely, 2^6540216 is an apocalyptic number.

It is an amenable number.

6540216 is an abundant number, since it is smaller than the sum of its proper divisors (10038744).

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

6540216 is a wasteful number, since it uses less digits than its factorization.

6540216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3815 (or 3811 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 6540216 is about 2557.3846015021. The cubic root of 6540216 is about 187.0096556731.

The spelling of 6540216 in words is "six million, five hundred forty thousand, two hundred sixteen".