131023232 has 32 divisors (see below), whose sum is σ = 263445600. Its totient is φ = 64903680.

The previous prime is 131023231. The next prime is 131023309. The reversal of 131023232 is 232320131.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 131023232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131023231) 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, 9257 + ... + 18647.

It is an arithmetic number, because the mean of its divisors is an integer number (8232675).

Almost surely, 2^131023232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131023232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131722800).

131023232 is an abundant number, since it is smaller than the sum of its proper divisors (132422368).

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

131023232 is an equidigital number, since it uses as much as digits as its factorization.

131023232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514 (or 9502 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 131023232 is about 11446.5379918996. The cubic root of 131023232 is about 507.9053288355.

Adding to 131023232 its reverse (232320131), we get a palindrome (363343363).

It can be divided in two parts, 1310 and 23232, that added together give a palindrome (24542).

The spelling of 131023232 in words is "one hundred thirty-one million, twenty-three thousand, two hundred thirty-two".