213023431205 has 8 divisors (see below), whose sum is σ = 275291818872. Its totient is φ = 157309610688.

The previous prime is 213023431193. The next prime is 213023431249. The reversal of 213023431205 is 502134320312.

It is a happy number.

213023431205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16527159364 + 196496271841 = 128558^2 + 443279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213023431205 - 2⁶ = 213023431141 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 1638641714 + ... + 1638641843.

It is an arithmetic number, because the mean of its divisors is an integer number (34411477359).

Almost surely, 2^213023431205 is an apocalyptic number.

It is an amenable number.

213023431205 is a deficient number, since it is larger than the sum of its proper divisors (62268387667).

213023431205 is a wasteful number, since it uses less digits than its factorization.

213023431205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277283575.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 213023431205 its reverse (502134320312), we get a palindrome (715157751517).

The spelling of 213023431205 in words is "two hundred thirteen billion, twenty-three million, four hundred thirty-one thousand, two hundred five".