2564215 has 4 divisors (see below), whose sum is σ = 3077064. Its totient is φ = 2051368.

The previous prime is 2564207. The next prime is 2564249. The reversal of 2564215 is 5124652.

2564215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2564215 - 2³ = 2564207 is a prime.

It is a d-powerful number, because it can be written as 2²⁰ + 5⁵ + 6⁵ + 4⁸ + 2²⁰ + 1 + 5⁸ .

It is a Duffinian number.

2564215 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2564215.

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, 256417 + ... + 256426.

It is an arithmetic number, because the mean of its divisors is an integer number (769266).

2^2564215 is an apocalyptic number.

2564215 is a deficient number, since it is larger than the sum of its proper divisors (512849).

2564215 is an equidigital number, since it uses as much as digits as its factorization.

2564215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512848.

The product of its digits is 2400, while the sum is 25.

The square root of 2564215 is about 1601.3166457637. The cubic root of 2564215 is about 136.8731131979.

Adding to 2564215 its reverse (5124652), we get a palindrome (7688867).

The spelling of 2564215 in words is "two million, five hundred sixty-four thousand, two hundred fifteen".