1215135315 has 48 divisors (see below), whose sum is σ = 2175054336. Its totient is φ = 627091200.

The previous prime is 1215135307. The next prime is 1215135331. The reversal of 1215135315 is 5135315121.

1215135315 is a `hidden beast` number, since 1 + 215 + 135 + 315 = 666.

It is not a de Polignac number, because 1215135315 - 2³ = 1215135307 is a prime.

It is an unprimeable number.

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 in 47 ways as a sum of consecutive naturals, for example, 316105 + ... + 319925.

It is an arithmetic number, because the mean of its divisors is an integer number (45313632).

Almost surely, 2^1215135315 is an apocalyptic number.

1215135315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1215135315 is a deficient number, since it is larger than the sum of its proper divisors (959919021).

1215135315 is a wasteful number, since it uses less digits than its factorization.

1215135315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060 (or 4057 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 1215135315 is about 34858.7910719807. The cubic root of 1215135315 is about 1067.1076031290.

The spelling of 1215135315 in words is "one billion, two hundred fifteen million, one hundred thirty-five thousand, three hundred fifteen".