7512332221 has 2 divisors, whose sum is σ = 7512332222. Its totient is φ = 7512332220.

The previous prime is 7512332171. The next prime is 7512332239. The reversal of 7512332221 is 1222332157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7290768996 + 221563225 = 85386^2 + 14885^2 .

It is an emirp because it is prime and its reverse (1222332157) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7512332221 - 2²³ = 7503943613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7512332221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7512332251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3756166110 + 3756166111.

It is an arithmetic number, because the mean of its divisors is an integer number (3756166111).

Almost surely, 2^7512332221 is an apocalyptic number.

It is an amenable number.

7512332221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7512332221 is an equidigital number, since it uses as much as digits as its factorization.

7512332221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 7512332221 is about 86673.7112451059. The cubic root of 7512332221 is about 1958.5061000382.

Adding to 7512332221 its reverse (1222332157), we get a palindrome (8734664378).

The spelling of 7512332221 in words is "seven billion, five hundred twelve million, three hundred thirty-two thousand, two hundred twenty-one".