232131312220 has 12 divisors (see below), whose sum is σ = 487475755704. Its totient is φ = 92852524880.

The previous prime is 232131312137. The next prime is 232131312223. The reversal of 232131312220 is 22213131232.

It is a super-2 number, since 2×232131312220² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 232131312191 and 232131312200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232131312223) 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, 5803282786 + ... + 5803282825.

It is an arithmetic number, because the mean of its divisors is an integer number (40622979642).

Almost surely, 2^232131312220 is an apocalyptic number.

232131312220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

232131312220 is an abundant number, since it is smaller than the sum of its proper divisors (255344443484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

232131312220 is a wasteful number, since it uses less digits than its factorization.

232131312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11606565620 (or 11606565618 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 232131312220 its reverse (22213131232), we get a palindrome (254344443452).

The spelling of 232131312220 in words is "two hundred thirty-two billion, one hundred thirty-one million, three hundred twelve thousand, two hundred twenty".