6345216 has 140 divisors (see below), whose sum is σ = 20126502. Its totient is φ = 1990656.

The previous prime is 6345197. The next prime is 6345253. The reversal of 6345216 is 6125436.

6345216 is a `hidden beast` number, since 634 + 5 + 21 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4665600 + 1679616 = 2160^2 + 1296^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 6345216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 373240 + ... + 373256.

Almost surely, 2^6345216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6345216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10063251).

6345216 is an abundant number, since it is smaller than the sum of its proper divisors (13781286).

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

6345216 is an frugal number, since it uses more digits than its factorization.

6345216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53 (or 22 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 6345216 is about 2518.9712185732. The cubic root of 6345216 is about 185.1322745274.

It can be divided in two parts, 6345 and 216, that added together give a 8-th power (6561 = 3⁸).

The spelling of 6345216 in words is "six million, three hundred forty-five thousand, two hundred sixteen".