1215113287 has 2 divisors, whose sum is σ = 1215113288. Its totient is φ = 1215113286.

The previous prime is 1215113281. The next prime is 1215113353. The reversal of 1215113287 is 7823115121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1215113287 - 2³ = 1215113279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215113281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607556643 + 607556644.

It is an arithmetic number, because the mean of its divisors is an integer number (607556644).

Almost surely, 2^1215113287 is an apocalyptic number.

1215113287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215113287 is an equidigital number, since it uses as much as digits as its factorization.

1215113287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 31.

The square root of 1215113287 is about 34858.4751100790. The cubic root of 1215113287 is about 1067.1011549066.

The spelling of 1215113287 in words is "one billion, two hundred fifteen million, one hundred thirteen thousand, two hundred eighty-seven".