233125561 has 2 divisors, whose sum is σ = 233125562. Its totient is φ = 233125560.

The previous prime is 233125531. The next prime is 233125583. The reversal of 233125561 is 165521332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138180025 + 94945536 = 11755^2 + 9744^2 .

It is a cyclic number.

It is not a de Polignac number, because 233125561 - 2²¹ = 231028409 is a prime.

It is not a weakly prime, because it can be changed into another prime (233125531) 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, 116562780 + 116562781.

It is an arithmetic number, because the mean of its divisors is an integer number (116562781).

Almost surely, 2^233125561 is an apocalyptic number.

It is an amenable number.

233125561 is a deficient number, since it is larger than the sum of its proper divisors (1).

233125561 is an equidigital number, since it uses as much as digits as its factorization.

233125561 is an odious number, because the sum of its binary digits is odd.

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

The square root of 233125561 is about 15268.4498558302. The cubic root of 233125561 is about 615.4554636047.

Adding to 233125561 its reverse (165521332), we get a palindrome (398646893).

The spelling of 233125561 in words is "two hundred thirty-three million, one hundred twenty-five thousand, five hundred sixty-one".