211313203231 has 4 divisors (see below), whose sum is σ = 227568065032. Its totient is φ = 195058341432.

The previous prime is 211313203219. The next prime is 211313203267. The reversal of 211313203231 is 132302313112.

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 211313203231 - 2¹³ = 211313195039 is a prime.

It is a super-2 number, since 2×211313203231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211313203201) 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, 8127430881 + ... + 8127430906.

It is an arithmetic number, because the mean of its divisors is an integer number (56892016258).

Almost surely, 2^211313203231 is an apocalyptic number.

211313203231 is a deficient number, since it is larger than the sum of its proper divisors (16254861801).

211313203231 is a wasteful number, since it uses less digits than its factorization.

211313203231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16254861800.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 211313203231 its reverse (132302313112), we get a palindrome (343615516343).

The spelling of 211313203231 in words is "two hundred eleven billion, three hundred thirteen million, two hundred three thousand, two hundred thirty-one".