232131002220 has 72 divisors (see below), whose sum is σ = 758294614896. Its totient is φ = 57139938432.

The previous prime is 232131002197. The next prime is 232131002221. The reversal of 232131002220 is 22200131232.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 232131002193 and 232131002202.

It is not an unprimeable number, because it can be changed into a prime (232131002221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49598302 + ... + 49602981.

Almost surely, 2^232131002220 is an apocalyptic number.

232131002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

232131002220 is an abundant number, since it is smaller than the sum of its proper divisors (526163612676).

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

232131002220 is a wasteful number, since it uses less digits than its factorization.

232131002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99201311 (or 99201306 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 232131002220 its reverse (22200131232), we get a palindrome (254331133452).

The spelling of 232131002220 in words is "two hundred thirty-two billion, one hundred thirty-one million, two thousand, two hundred twenty".