2543215 has 4 divisors (see below), whose sum is σ = 3051864. Its totient is φ = 2034568.

The previous prime is 2543201. The next prime is 2543221. The reversal of 2543215 is 5123452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2543215 - 2⁹ = 2542703 is a prime.

It is a Duffinian number.

2543215 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254317 + ... + 254326.

It is an arithmetic number, because the mean of its divisors is an integer number (762966).

2^2543215 is an apocalyptic number.

2543215 is a deficient number, since it is larger than the sum of its proper divisors (508649).

2543215 is an equidigital number, since it uses as much as digits as its factorization.

2543215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508648.

The product of its digits is 1200, while the sum is 22.

The square root of 2543215 is about 1594.7460612900. The cubic root of 2543215 is about 136.4984413048.

Adding to 2543215 its reverse (5123452), we get a palindrome (7666667).

The spelling of 2543215 in words is "two million, five hundred forty-three thousand, two hundred fifteen".