1215524330985 has 32 divisors (see below), whose sum is σ = 1951135119360. Its totient is φ = 646183692288.

The previous prime is 1215524330981. The next prime is 1215524330989. The reversal of 1215524330985 is 5890334255121.

It is an interprime number because it is at equal distance from previous prime (1215524330981) and next prime (1215524330989).

It is not a de Polignac number, because 1215524330985 - 2² = 1215524330981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215524330981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6973981 + ... + 7146149.

It is an arithmetic number, because the mean of its divisors is an integer number (60972972480).

Almost surely, 2^{1215524330985} is an apocalyptic number.

1215524330985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215524330985 is a deficient number, since it is larger than the sum of its proper divisors (735610788375).

1215524330985 is a wasteful number, since it uses less digits than its factorization.

1215524330985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173697.

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 1215524330985 in words is "one trillion, two hundred fifteen billion, five hundred twenty-four million, three hundred thirty thousand, nine hundred eighty-five".