75323330221 has 2 divisors, whose sum is σ = 75323330222. Its totient is φ = 75323330220.

The previous prime is 75323330213. The next prime is 75323330233. The reversal of 75323330221 is 12203332357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66848102500 + 8475227721 = 258550^2 + 92061^2 .

It is a cyclic number.

It is not a de Polignac number, because 75323330221 - 2³ = 75323330213 is a prime.

It is a super-3 number, since 3×75323330221³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75323330281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37661665110 + 37661665111.

It is an arithmetic number, because the mean of its divisors is an integer number (37661665111).

Almost surely, 2^75323330221 is an apocalyptic number.

It is an amenable number.

75323330221 is a deficient number, since it is larger than the sum of its proper divisors (1).

75323330221 is an equidigital number, since it uses as much as digits as its factorization.

75323330221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 31.

Adding to 75323330221 its reverse (12203332357), we get a palindrome (87526662578).

The spelling of 75323330221 in words is "seventy-five billion, three hundred twenty-three million, three hundred thirty thousand, two hundred twenty-one".