1215545333983 has 4 divisors (see below), whose sum is σ = 1220853392440. Its totient is φ = 1210237275528.

The previous prime is 1215545333939. The next prime is 1215545334041. The reversal of 1215545333983 is 3893335455121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215545333983 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 1215545333983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215545333083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2654028885 + ... + 2654029342.

It is an arithmetic number, because the mean of its divisors is an integer number (305213348110).

Almost surely, 2^{1215545333983} is an apocalyptic number.

1215545333983 is a deficient number, since it is larger than the sum of its proper divisors (5308058457).

1215545333983 is an equidigital number, since it uses as much as digits as its factorization.

1215545333983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308058456.

The product of its digits is 5832000, while the sum is 52.

The spelling of 1215545333983 in words is "one trillion, two hundred fifteen billion, five hundred forty-five million, three hundred thirty-three thousand, nine hundred eighty-three".