232031540 has 48 divisors (see below), whose sum is σ = 528955392. Its totient is φ = 84986496.

The previous prime is 232031539. The next prime is 232031549. The reversal of 232031540 is 45130232.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232031549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29507 + ... + 36533.

It is an arithmetic number, because the mean of its divisors is an integer number (11019904).

Almost surely, 2^232031540 is an apocalyptic number.

232031540 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 232031540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264477696).

232031540 is an abundant number, since it is smaller than the sum of its proper divisors (296923852).

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

232031540 is a wasteful number, since it uses less digits than its factorization.

232031540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7176 (or 7174 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 232031540 is about 15232.5815277648. The cubic root of 232031540 is about 614.4912089538.

Adding to 232031540 its reverse (45130232), we get a palindrome (277161772).

The spelling of 232031540 in words is "two hundred thirty-two million, thirty-one thousand, five hundred forty".