352121521 has 2 divisors, whose sum is σ = 352121522. Its totient is φ = 352121520.

The previous prime is 352121519. The next prime is 352121531. The reversal of 352121521 is 125121253.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351375025 + 746496 = 18745^2 + 864^2 .

It is an emirp because it is prime and its reverse (125121253) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 352121521 - 2¹ = 352121519 is a prime.

Together with 352121519, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 352121492 and 352121501.

It is not a weakly prime, because it can be changed into another prime (352121501) 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, 176060760 + 176060761.

It is an arithmetic number, because the mean of its divisors is an integer number (176060761).

Almost surely, 2^352121521 is an apocalyptic number.

It is an amenable number.

352121521 is a deficient number, since it is larger than the sum of its proper divisors (1).

352121521 is an equidigital number, since it uses as much as digits as its factorization.

352121521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 600, while the sum is 22.

The square root of 352121521 is about 18764.9013053626. The cubic root of 352121521 is about 706.1509098872.

Adding to 352121521 its reverse (125121253), we get a palindrome (477242774).

The spelling of 352121521 in words is "three hundred fifty-two million, one hundred twenty-one thousand, five hundred twenty-one".