1215532907 has 2 divisors, whose sum is σ = 1215532908. Its totient is φ = 1215532906.

The previous prime is 1215532859. The next prime is 1215532919. The reversal of 1215532907 is 7092355121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215532907 - 2¹⁰ = 1215531883 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215532607) 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, 607766453 + 607766454.

It is an arithmetic number, because the mean of its divisors is an integer number (607766454).

Almost surely, 2^1215532907 is an apocalyptic number.

1215532907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215532907 is an equidigital number, since it uses as much as digits as its factorization.

1215532907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 1215532907 is about 34864.4934998345. The cubic root of 1215532907 is about 1067.2239762262.

The spelling of 1215532907 in words is "one billion, two hundred fifteen million, five hundred thirty-two thousand, nine hundred seven".