2223729 has 12 divisors (see below), whose sum is σ = 3230032. Its totient is φ = 1474200.

The previous prime is 2223713. The next prime is 2223731. The reversal of 2223729 is 9273222.

It is not a de Polignac number, because 2223729 - 2⁴ = 2223713 is a prime.

It is a d-powerful number, because it can be written as 2² + 2¹³ + 2²⁰ + 3 + 7⁶ + 2²⁰ + 9³ .

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2223329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1314 + ... + 2484.

2^2223729 is an apocalyptic number.

It is an amenable number.

2223729 is a deficient number, since it is larger than the sum of its proper divisors (1006303).

2223729 is a wasteful number, since it uses less digits than its factorization.

2223729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388 (or 1385 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 2223729 is about 1491.2172879899. The cubic root of 2223729 is about 130.5250755531.

The spelling of 2223729 in words is "two million, two hundred twenty-three thousand, seven hundred twenty-nine".