2543216 has 20 divisors (see below), whose sum is σ = 5306952. Its totient is φ = 1173696.

The previous prime is 2543201. The next prime is 2543221. The reversal of 2543216 is 6123452.

2543216 = T₆₁₉ + T₆₂₀ + ... + T₆₃₁.

2543216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 2543191 and 2543200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5906 + ... + 6321.

2^2543216 is an apocalyptic number.

2543216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2543216 is an abundant number, since it is smaller than the sum of its proper divisors (2763736).

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

2543216 is a wasteful number, since it uses less digits than its factorization.

2543216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12248 (or 12242 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 2543216 is about 1594.7463748195. The cubic root of 2543216 is about 136.4984591954.

Adding to 2543216 its reverse (6123452), we get a palindrome (8666668).

The spelling of 2543216 in words is "two million, five hundred forty-three thousand, two hundred sixteen".