213132231312231 has 48 divisors (see below), whose sum is σ = 361591303125888. Its totient is φ = 110421210715200.

The previous prime is 213132231312199. The next prime is 213132231312251. The reversal of 213132231312231 is 132213132231312.

It is a happy number.

It is not a de Polignac number, because 213132231312231 - 2⁵ = 213132231312199 is a prime.

It is a super-2 number, since 2×213132231312231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213132231312251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 176082105 + ... + 177288386.

It is an arithmetic number, because the mean of its divisors is an integer number (7533152148456).

Almost surely, 2^{213132231312231} is an apocalyptic number.

213132231312231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213132231312231 is a deficient number, since it is larger than the sum of its proper divisors (148459071813657).

213132231312231 is a wasteful number, since it uses less digits than its factorization.

213132231312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353370892 (or 353370885 counting only the distinct ones).

The product of its digits is 7776, while the sum is 30.

Adding to 213132231312231 its reverse (132213132231312), we get a palindrome (345345363543543).

The spelling of 213132231312231 in words is "two hundred thirteen trillion, one hundred thirty-two billion, two hundred thirty-one million, three hundred twelve thousand, two hundred thirty-one".