213123556034 has 4 divisors (see below), whose sum is σ = 319685334054. Its totient is φ = 106561778016.

The previous prime is 213123555961. The next prime is 213123556049. The reversal of 213123556034 is 430655321312.

It is a happy number.

213123556034 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 204932763025 + 8190793009 = 452695^2 + 90503^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213123555985 and 213123556003.

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 as a sum of consecutive naturals, namely, 53280889007 + ... + 53280889010.

Almost surely, 2^213123556034 is an apocalyptic number.

213123556034 is a deficient number, since it is larger than the sum of its proper divisors (106561778020).

213123556034 is a wasteful number, since it uses less digits than its factorization.

213123556034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106561778019.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 213123556034 its reverse (430655321312), we get a palindrome (643778877346).

The spelling of 213123556034 in words is "two hundred thirteen billion, one hundred twenty-three million, five hundred fifty-six thousand, thirty-four".