233543607221 has 2 divisors, whose sum is σ = 233543607222. Its totient is φ = 233543607220.

The previous prime is 233543607191. The next prime is 233543607277. The reversal of 233543607221 is 122706345332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231606375025 + 1937232196 = 481255^2 + 44014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233543607221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233543604221) 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, 116771803610 + 116771803611.

It is an arithmetic number, because the mean of its divisors is an integer number (116771803611).

Almost surely, 2^233543607221 is an apocalyptic number.

It is an amenable number.

233543607221 is a deficient number, since it is larger than the sum of its proper divisors (1).

233543607221 is an equidigital number, since it uses as much as digits as its factorization.

233543607221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 38.

The spelling of 233543607221 in words is "two hundred thirty-three billion, five hundred forty-three million, six hundred seven thousand, two hundred twenty-one".