223232561 has 2 divisors, whose sum is σ = 223232562. Its totient is φ = 223232560.

The previous prime is 223232531. The next prime is 223232617. The reversal of 223232561 is 165232322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123632161 + 99600400 = 11119^2 + 9980^2 .

It is a cyclic number.

It is not a de Polignac number, because 223232561 - 2²⁶ = 156123697 is a prime.

It is a super-3 number, since 3×223232561³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223232561.

It is not a weakly prime, because it can be changed into another prime (223232531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111616280 + 111616281.

It is an arithmetic number, because the mean of its divisors is an integer number (111616281).

Almost surely, 2^223232561 is an apocalyptic number.

It is an amenable number.

223232561 is a deficient number, since it is larger than the sum of its proper divisors (1).

223232561 is an equidigital number, since it uses as much as digits as its factorization.

223232561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 26.

The square root of 223232561 is about 14940.9692122031. The cubic root of 223232561 is about 606.6234303137.

Adding to 223232561 its reverse (165232322), we get a palindrome (388464883).

The spelling of 223232561 in words is "two hundred twenty-three million, two hundred thirty-two thousand, five hundred sixty-one".