2223945 has 24 divisors (see below), whose sum is σ = 3913416. Its totient is φ = 1168128.

The previous prime is 2223943. The next prime is 2223967. The reversal of 2223945 is 5493222.

It can be written as a sum of positive squares in 4 ways, for example, as 944784 + 1279161 = 972^2 + 1131^2 .

It is not a de Polignac number, because 2223945 - 2¹ = 2223943 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 2⁷ + 2¹³ + 3⁵ + 9² + 4⁹ + 5⁹ .

It is not an unprimeable number, because it can be changed into a prime (2223943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2947 + ... + 3623.

It is an arithmetic number, because the mean of its divisors is an integer number (163059).

2^2223945 is an apocalyptic number.

It is an amenable number.

2223945 is a deficient number, since it is larger than the sum of its proper divisors (1689471).

2223945 is a wasteful number, since it uses less digits than its factorization.

2223945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 758 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 2223945 is about 1491.2897102844. The cubic root of 2223945 is about 130.5293015632.

The spelling of 2223945 in words is "two million, two hundred twenty-three thousand, nine hundred forty-five".