1215316485 has 72 divisors (see below), whose sum is σ = 2311250760. Its totient is φ = 588693504.

The previous prime is 1215316471. The next prime is 1215316517. The reversal of 1215316485 is 5846135121.

1215316485 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 3 + 1 + 648 + 5 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 106626276 + 1108690209 = 10326^2 + 33297^2 .

It is not a de Polignac number, because 1215316485 - 2⁸ = 1215316229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 642421 + ... + 644309.

It is an arithmetic number, because the mean of its divisors is an integer number (32100705).

Almost surely, 2^1215316485 is an apocalyptic number.

1215316485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215316485 is a deficient number, since it is larger than the sum of its proper divisors (1095934275).

1215316485 is a wasteful number, since it uses less digits than its factorization.

1215316485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975 (or 1943 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 1215316485 is about 34861.3896022519. The cubic root of 1215316485 is about 1067.1606337873.

The spelling of 1215316485 in words is "one billion, two hundred fifteen million, three hundred sixteen thousand, four hundred eighty-five".