223522009 has 2 divisors, whose sum is σ = 223522010. Its totient is φ = 223522008.

The previous prime is 223521979. The next prime is 223522021. The reversal of 223522009 is 900225322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120560400 + 102961609 = 10980^2 + 10147^2 .

It is a cyclic number.

It is not a de Polignac number, because 223522009 - 2¹⁵ = 223489241 is a prime.

It is equal to p_12306067 and since 223522009 and 12306067 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (223522109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111761004 + 111761005.

It is an arithmetic number, because the mean of its divisors is an integer number (111761005).

Almost surely, 2^223522009 is an apocalyptic number.

It is an amenable number.

223522009 is a deficient number, since it is larger than the sum of its proper divisors (1).

223522009 is an equidigital number, since it uses as much as digits as its factorization.

223522009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 223522009 is about 14950.6524606788. The cubic root of 223522009 is about 606.8855039453.

The spelling of 223522009 in words is "two hundred twenty-three million, five hundred twenty-two thousand, nine".