213232220231 has 16 divisors (see below), whose sum is σ = 224327147520. Its totient is φ = 202296061440.

The previous prime is 213232220221. The next prime is 213232220233. The reversal of 213232220231 is 132022232312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213232220231 is a prime.

It is a super-2 number, since 2×213232220231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 213232220197 and 213232220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213232220233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1313255 + ... + 1466663.

It is an arithmetic number, because the mean of its divisors is an integer number (14020446720).

Almost surely, 2^213232220231 is an apocalyptic number.

213232220231 is a deficient number, since it is larger than the sum of its proper divisors (11094927289).

213232220231 is a wasteful number, since it uses less digits than its factorization.

213232220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153926.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 213232220231 its reverse (132022232312), we get a palindrome (345254452543).

The spelling of 213232220231 in words is "two hundred thirteen billion, two hundred thirty-two million, two hundred twenty thousand, two hundred thirty-one".