233713557221 has 2 divisors, whose sum is σ = 233713557222. Its totient is φ = 233713557220.

The previous prime is 233713557179. The next prime is 233713557239. The reversal of 233713557221 is 122755317332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208744816996 + 24968740225 = 456886^2 + 158015^2 .

It is a cyclic number.

It is not a de Polignac number, because 233713557221 - 2⁶ = 233713557157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233713557281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116856778610 + 116856778611.

It is an arithmetic number, because the mean of its divisors is an integer number (116856778611).

Almost surely, 2^233713557221 is an apocalyptic number.

It is an amenable number.

233713557221 is a deficient number, since it is larger than the sum of its proper divisors (1).

233713557221 is an equidigital number, since it uses as much as digits as its factorization.

233713557221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 41.

The spelling of 233713557221 in words is "two hundred thirty-three billion, seven hundred thirteen million, five hundred fifty-seven thousand, two hundred twenty-one".