1215331620005 has 32 divisors (see below), whose sum is σ = 1476046860288. Its totient is φ = 960572390400.

The previous prime is 1215331620001. The next prime is 1215331620007. The reversal of 1215331620005 is 5000261335121.

It is not a de Polignac number, because 1215331620005 - 2² = 1215331620001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1215331620005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215331620001) 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, 156995435 + ... + 157003175.

It is an arithmetic number, because the mean of its divisors is an integer number (46126464384).

Almost surely, 2^{1215331620005} is an apocalyptic number.

It is an amenable number.

1215331620005 is a deficient number, since it is larger than the sum of its proper divisors (260715240283).

1215331620005 is a wasteful number, since it uses less digits than its factorization.

1215331620005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8877.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 1215331620005 its reverse (5000261335121), we get a palindrome (6215592955126).

The spelling of 1215331620005 in words is "one trillion, two hundred fifteen billion, three hundred thirty-one million, six hundred twenty thousand, five".