223240009 has 2 divisors, whose sum is σ = 223240010. Its totient is φ = 223240008.

The previous prime is 223239983. The next prime is 223240019. The reversal of 223240009 is 900042322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209438784 + 13801225 = 14472^2 + 3715^2 .

It is a cyclic number.

It is not a de Polignac number, because 223240009 - 2¹⁵ = 223207241 is a prime.

It is a super-3 number, since 3×223240009³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (223240019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111620004 + 111620005.

It is an arithmetic number, because the mean of its divisors is an integer number (111620005).

Almost surely, 2^223240009 is an apocalyptic number.

It is an amenable number.

223240009 is a deficient number, since it is larger than the sum of its proper divisors (1).

223240009 is an equidigital number, since it uses as much as digits as its factorization.

223240009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 223240009 is about 14941.2184576761. The cubic root of 223240009 is about 606.6301767624.

The spelling of 223240009 in words is "two hundred twenty-three million, two hundred forty thousand, nine".