1321361512515 has 48 divisors (see below), whose sum is σ = 2645549483616. Its totient is φ = 602974233600.

The previous prime is 1321361512483. The next prime is 1321361512567. The reversal of 1321361512515 is 5152151631231.

1321361512515 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 3 + 615 + 1 + 25 + 15 = 666.

It is not a de Polignac number, because 1321361512515 - 2⁵ = 1321361512483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321361512515.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78503856 + ... + 78520685.

It is an arithmetic number, because the mean of its divisors is an integer number (55115614242).

Almost surely, 2^{1321361512515} is an apocalyptic number.

1321361512515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1321361512515 is an abundant number, since it is smaller than the sum of its proper divisors (1324187971101).

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

1321361512515 is a wasteful number, since it uses less digits than its factorization.

1321361512515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157024580 (or 157024577 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The spelling of 1321361512515 in words is "one trillion, three hundred twenty-one billion, three hundred sixty-one million, five hundred twelve thousand, five hundred fifteen".