1215553520043 has 24 divisors (see below), whose sum is σ = 1808604638048. Its totient is φ = 786127410432.

The previous prime is 1215553520033. The next prime is 1215553520057. The reversal of 1215553520043 is 3400253555121.

1215553520043 is a `hidden beast` number, since 1 + 2 + 15 + 553 + 52 + 0 + 0 + 43 = 666.

It is not a de Polignac number, because 1215553520043 - 2⁶ = 1215553519979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215553520033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5303671 + ... + 5528112.

Almost surely, 2^{1215553520043} is an apocalyptic number.

1215553520043 is a deficient number, since it is larger than the sum of its proper divisors (593051118005).

1215553520043 is a wasteful number, since it uses less digits than its factorization.

1215553520043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10832163 (or 10832160 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 1215553520043 in words is "one trillion, two hundred fifteen billion, five hundred fifty-three million, five hundred twenty thousand, forty-three".