232131223220 has 96 divisors (see below), whose sum is σ = 537469481472. Its totient is φ = 83671999488.

The previous prime is 232131223193. The next prime is 232131223223. The reversal of 232131223220 is 22322131232.

It is a super-2 number, since 2×232131223220² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232131223223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26637584 + ... + 26646296.

It is an arithmetic number, because the mean of its divisors is an integer number (5598640432).

Almost surely, 2^232131223220 is an apocalyptic number.

232131223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 232131223220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268734740736).

232131223220 is an abundant number, since it is smaller than the sum of its proper divisors (305338258252).

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

232131223220 is a wasteful number, since it uses less digits than its factorization.

232131223220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11161 (or 11159 counting only the distinct ones).

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

Adding to 232131223220 its reverse (22322131232), we get a palindrome (254453354452).

The spelling of 232131223220 in words is "two hundred thirty-two billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred twenty".