213220320231 has 16 divisors (see below), whose sum is σ = 284784048864. Its totient is φ = 141901822464.

The previous prime is 213220320197. The next prime is 213220320253. The reversal of 213220320231 is 132023022312.

It is a happy number.

It is not a de Polignac number, because 213220320231 - 2¹⁷ = 213220189159 is a prime.

It is a super-2 number, since 2×213220320231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213220320198 and 213220320207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213220320281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18285355 + ... + 18297011.

It is an arithmetic number, because the mean of its divisors is an integer number (17799003054).

Almost surely, 2^213220320231 is an apocalyptic number.

213220320231 is a deficient number, since it is larger than the sum of its proper divisors (71563728633).

213220320231 is a wasteful number, since it uses less digits than its factorization.

213220320231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21650.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 213220320231 its reverse (132023022312), we get a palindrome (345243342543).

The spelling of 213220320231 in words is "two hundred thirteen billion, two hundred twenty million, three hundred twenty thousand, two hundred thirty-one".