233245561 has 2 divisors, whose sum is σ = 233245562. Its totient is φ = 233245560.

The previous prime is 233245549. The next prime is 233245589. The reversal of 233245561 is 165542332.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163840000 + 69405561 = 12800^2 + 8331^2 .

It is a cyclic number.

It is not a de Polignac number, because 233245561 - 2²¹ = 231148409 is a prime.

It is not a weakly prime, because it can be changed into another prime (233245541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116622780 + 116622781.

It is an arithmetic number, because the mean of its divisors is an integer number (116622781).

Almost surely, 2^233245561 is an apocalyptic number.

It is an amenable number.

233245561 is a deficient number, since it is larger than the sum of its proper divisors (1).

233245561 is an equidigital number, since it uses as much as digits as its factorization.

233245561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 31.

The square root of 233245561 is about 15272.3790222742. The cubic root of 233245561 is about 615.5610461741.

Adding to 233245561 its reverse (165542332), we get a palindrome (398787893).

The spelling of 233245561 in words is "two hundred thirty-three million, two hundred forty-five thousand, five hundred sixty-one".