222530509 has 2 divisors, whose sum is σ = 222530510. Its totient is φ = 222530508.

The previous prime is 222530491. The next prime is 222530531. The reversal of 222530509 is 905035222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218389284 + 4141225 = 14778^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 222530509 - 2⁷ = 222530381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222530569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111265254 + 111265255.

It is an arithmetic number, because the mean of its divisors is an integer number (111265255).

Almost surely, 2^222530509 is an apocalyptic number.

It is an amenable number.

222530509 is a deficient number, since it is larger than the sum of its proper divisors (1).

222530509 is an equidigital number, since it uses as much as digits as its factorization.

222530509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 222530509 is about 14917.4565191255. The cubic root of 222530509 is about 605.9868319780.

The spelling of 222530509 in words is "two hundred twenty-two million, five hundred thirty thousand, five hundred nine".