215403432353 has 2 divisors, whose sum is σ = 215403432354. Its totient is φ = 215403432352.

The previous prime is 215403432323. The next prime is 215403432463. The reversal of 215403432353 is 353234304512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162846952849 + 52556479504 = 403543^2 + 229252^2 .

It is a cyclic number.

It is not a de Polignac number, because 215403432353 - 2²⁸ = 215134996897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (215403432313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107701716176 + 107701716177.

It is an arithmetic number, because the mean of its divisors is an integer number (107701716177).

Almost surely, 2^215403432353 is an apocalyptic number.

It is an amenable number.

215403432353 is a deficient number, since it is larger than the sum of its proper divisors (1).

215403432353 is an equidigital number, since it uses as much as digits as its factorization.

215403432353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 35.

Adding to 215403432353 its reverse (353234304512), we get a palindrome (568637736865).

The spelling of 215403432353 in words is "two hundred fifteen billion, four hundred three million, four hundred thirty-two thousand, three hundred fifty-three".