1215553524343 has 4 divisors (see below), whose sum is σ = 1218454607160. Its totient is φ = 1212652441528.

The previous prime is 1215553524331. The next prime is 1215553524371. The reversal of 1215553524343 is 3434253555121.

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-1215553524343 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 1215553524343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215553524043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1450540780 + ... + 1450541617.

It is an arithmetic number, because the mean of its divisors is an integer number (304613651790).

Almost surely, 2^{1215553524343} is an apocalyptic number.

1215553524343 is a deficient number, since it is larger than the sum of its proper divisors (2901082817).

1215553524343 is an equidigital number, since it uses as much as digits as its factorization.

1215553524343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901082816.

The product of its digits is 1080000, while the sum is 43.

The spelling of 1215553524343 in words is "one trillion, two hundred fifteen billion, five hundred fifty-three million, five hundred twenty-four thousand, three hundred forty-three".