1215312047520 has 768 divisors, whose sum is σ = 4195531468800. Its totient is φ = 294931169280.

The previous prime is 1215312047513. The next prime is 1215312047591. The reversal of 1215312047520 is 257402135121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2900505871 + ... + 2900506289.

It is an arithmetic number, because the mean of its divisors is an integer number (5462931600).

Almost surely, 2^{1215312047520} is an apocalyptic number.

1215312047520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215312047520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2097765734400).

1215312047520 is an abundant number, since it is smaller than the sum of its proper divisors (2980219421280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215312047520 is a wasteful number, since it uses less digits than its factorization.

1215312047520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The spelling of 1215312047520 in words is "one trillion, two hundred fifteen billion, three hundred twelve million, forty-seven thousand, five hundred twenty".