1215353104543 has 4 divisors (see below), whose sum is σ = 1217890376640. Its totient is φ = 1212815832448.

The previous prime is 1215353104501. The next prime is 1215353104577. The reversal of 1215353104543 is 3454013535121.

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-1215353104543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215353104643) 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, 1268635330 + ... + 1268636287.

It is an arithmetic number, because the mean of its divisors is an integer number (304472594160).

Almost surely, 2^{1215353104543} is an apocalyptic number.

1215353104543 is a deficient number, since it is larger than the sum of its proper divisors (2537272097).

1215353104543 is an equidigital number, since it uses as much as digits as its factorization.

1215353104543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537272096.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 1215353104543 its reverse (3454013535121), we get a palindrome (4669366639664).

The spelling of 1215353104543 in words is "one trillion, two hundred fifteen billion, three hundred fifty-three million, one hundred four thousand, five hundred forty-three".