2815223 has 4 divisors (see below), whose sum is σ = 2937648. Its totient is φ = 2692800.

The previous prime is 2815207. The next prime is 2815237. The reversal of 2815223 is 3225182.

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 2815223 - 2⁴ = 2815207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 122401 = 2815223 / (2 + 8 + 1 + 5 + 2 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61178 + ... + 61223.

It is an arithmetic number, because the mean of its divisors is an integer number (734412).

2^2815223 is an apocalyptic number.

2815223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2815223 is a deficient number, since it is larger than the sum of its proper divisors (122425).

2815223 is a wasteful number, since it uses less digits than its factorization.

2815223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122424.

The product of its digits is 960, while the sum is 23.

The square root of 2815223 is about 1677.8626284652. The cubic root of 2815223 is about 141.2009441470.

It can be divided in two parts, 28 and 15223, that added together give a palindrome (15251).

The spelling of 2815223 in words is "two million, eight hundred fifteen thousand, two hundred twenty-three".