13215215455543 has 4 divisors (see below), whose sum is σ = 13236158745328. Its totient is φ = 13194272165760.

The previous prime is 13215215455537. The next prime is 13215215455549. The reversal of 13215215455543 is 34555451251231.

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

It is an interprime number because it is at equal distance from previous prime (13215215455537) and next prime (13215215455549).

It is a cyclic number.

It is not a de Polignac number, because 13215215455543 - 2⁵ = 13215215455511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13215215455493 and 13215215455502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13215215455549) 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, 10471643946 + ... + 10471645207.

It is an arithmetic number, because the mean of its divisors is an integer number (3309039686332).

Almost surely, 2^{13215215455543} is an apocalyptic number.

13215215455543 is a deficient number, since it is larger than the sum of its proper divisors (20943289785).

13215215455543 is an equidigital number, since it uses as much as digits as its factorization.

13215215455543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20943289784.

The product of its digits is 1800000, while the sum is 46.

The spelling of 13215215455543 in words is "thirteen trillion, two hundred fifteen billion, two hundred fifteen million, four hundred fifty-five thousand, five hundred forty-three".