205155323033543 has 4 divisors (see below), whose sum is σ = 205155823745568. Its totient is φ = 205154822321520.

The previous prime is 205155323033519. The next prime is 205155323033561. The reversal of 205155323033543 is 345330323551502.

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

It is a cyclic number.

It is not a de Polignac number, because 205155323033543 - 2²⁰ = 205155321984967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205155323033494 and 205155323033503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205155323035543) 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, 249740918 + ... + 250561043.

It is an arithmetic number, because the mean of its divisors is an integer number (51288955936392).

Almost surely, 2^{205155323033543} is an apocalyptic number.

205155323033543 is a deficient number, since it is larger than the sum of its proper divisors (500712025).

205155323033543 is an equidigital number, since it uses as much as digits as its factorization.

205155323033543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500712024.

The product of its (nonzero) digits is 2430000, while the sum is 44.

The spelling of 205155323033543 in words is "two hundred five trillion, one hundred fifty-five billion, three hundred twenty-three million, thirty-three thousand, five hundred forty-three".