2223561 has 4 divisors (see below), whose sum is σ = 2964752. Its totient is φ = 1482372.

The previous prime is 2223541. The next prime is 2223563. The reversal of 2223561 is 1653222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2223561 - 2⁶ = 2223497 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 2¹⁷ + 2¹⁷ + 3 + 5⁹ + 6⁵ + 1 .

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2223563) 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, 370591 + ... + 370596.

It is an arithmetic number, because the mean of its divisors is an integer number (741188).

2^2223561 is an apocalyptic number.

It is an amenable number.

2223561 is a deficient number, since it is larger than the sum of its proper divisors (741191).

2223561 is an equidigital number, since it uses as much as digits as its factorization.

2223561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741190.

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

The square root of 2223561 is about 1491.1609571069. The cubic root of 2223561 is about 130.5217884672.

Adding to 2223561 its reverse (1653222), we get a palindrome (3876783).

The spelling of 2223561 in words is "two million, two hundred twenty-three thousand, five hundred sixty-one".