1215050216538 has 16 divisors (see below), whose sum is σ = 2432480563296. Its totient is φ = 404620050480.

The previous prime is 1215050216519. The next prime is 1215050216551. The reversal of 1215050216538 is 8356120505121.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1215050216496 and 1215050216505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99165456 + ... + 99177707.

It is an arithmetic number, because the mean of its divisors is an integer number (152030035206).

Almost surely, 2^{1215050216538} is an apocalyptic number.

1215050216538 is an abundant number, since it is smaller than the sum of its proper divisors (1217430346758).

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

1215050216538 is a wasteful number, since it uses less digits than its factorization.

1215050216538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198344189.

The product of its (nonzero) digits is 72000, while the sum is 39.

The spelling of 1215050216538 in words is "one trillion, two hundred fifteen billion, fifty million, two hundred sixteen thousand, five hundred thirty-eight".