1232131500 has 144 divisors (see below), whose sum is σ = 4031323296. Its totient is φ = 328536000.

The previous prime is 1232131451. The next prime is 1232131501. The reversal of 1232131500 is 51312321.

1232131500 is a `hidden beast` number, since 1 + 2 + 32 + 131 + 500 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232131501) 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, 116430 + ... + 126570.

Almost surely, 2^1232131500 is an apocalyptic number.

1232131500 is a gapful number since it is divisible by the number (10) 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 1232131500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2015661648).

1232131500 is an abundant number, since it is smaller than the sum of its proper divisors (2799191796).

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

1232131500 is a wasteful number, since it uses less digits than its factorization.

1232131500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10175 (or 10151 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1232131500 is about 35101.7307265610. The cubic root of 1232131500 is about 1072.0598223002.

Adding to 1232131500 its reverse (51312321), we get a palindrome (1283443821).

The spelling of 1232131500 in words is "one billion, two hundred thirty-two million, one hundred thirty-one thousand, five hundred".