1215065563 has 2 divisors, whose sum is σ = 1215065564. Its totient is φ = 1215065562.

The previous prime is 1215065557. The next prime is 1215065567. The reversal of 1215065563 is 3655605121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215065563 - 2¹⁷ = 1214934491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215065567) 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, 607532781 + 607532782.

It is an arithmetic number, because the mean of its divisors is an integer number (607532782).

Almost surely, 2^1215065563 is an apocalyptic number.

1215065563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215065563 is an equidigital number, since it uses as much as digits as its factorization.

1215065563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 1215065563 is about 34857.7905639471. The cubic root of 1215065563 is about 1067.0871844665.

The spelling of 1215065563 in words is "one billion, two hundred fifteen million, sixty-five thousand, five hundred sixty-three".