213103655543 has 4 divisors (see below), whose sum is σ = 215095278600. Its totient is φ = 211112032488.

The previous prime is 213103655497. The next prime is 213103655551. The reversal of 213103655543 is 345556301312.

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 213103655543 - 2²⁰ = 213102606967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213103655497 and 213103655506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213103625543) 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, 995811368 + ... + 995811581.

It is an arithmetic number, because the mean of its divisors is an integer number (53773819650).

Almost surely, 2^213103655543 is an apocalyptic number.

213103655543 is a deficient number, since it is larger than the sum of its proper divisors (1991623057).

213103655543 is a wasteful number, since it uses less digits than its factorization.

213103655543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991623056.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 213103655543 its reverse (345556301312), we get a palindrome (558659956855).

The spelling of 213103655543 in words is "two hundred thirteen billion, one hundred three million, six hundred fifty-five thousand, five hundred forty-three".