213505212534 has 16 divisors (see below), whose sum is σ = 427071536688. Its totient is φ = 71158218912.

The previous prime is 213505212527. The next prime is 213505212589. The reversal of 213505212534 is 435212505312.

213505212534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 213505212495 and 213505212504.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2500837 + ... + 2584800.

It is an arithmetic number, because the mean of its divisors is an integer number (26691971043).

Almost surely, 2^213505212534 is an apocalyptic number.

213505212534 is an abundant number, since it is smaller than the sum of its proper divisors (213566324154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213505212534 is a wasteful number, since it uses less digits than its factorization.

213505212534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5092639.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 213505212534 its reverse (435212505312), we get a palindrome (648717717846).

The spelling of 213505212534 in words is "two hundred thirteen billion, five hundred five million, two hundred twelve thousand, five hundred thirty-four".