2215623 has 16 divisors (see below), whose sum is σ = 3059456. Its totient is φ = 1425600.

The previous prime is 2215583. The next prime is 2215639. The reversal of 2215623 is 3265122.

It is not a de Polignac number, because 2215623 - 2⁹ = 2215111 is a prime.

It is a d-powerful number, because it can be written as 2⁶ + 2⁸ + 1 + 5⁹ + 6 + 2¹⁸ + 3³ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2215623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14598 + ... + 14748.

It is an arithmetic number, because the mean of its divisors is an integer number (191216).

2^2215623 is an apocalyptic number.

2215623 is a deficient number, since it is larger than the sum of its proper divisors (843833).

2215623 is a wasteful number, since it uses less digits than its factorization.

2215623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294.

The product of its digits is 720, while the sum is 21.

The square root of 2215623 is about 1488.4968928419. The cubic root of 2215623 is about 130.3662845513.

The spelling of 2215623 in words is "two million, two hundred fifteen thousand, six hundred twenty-three".