231145500 has 48 divisors (see below), whose sum is σ = 673100064. Its totient is φ = 61638400.

The previous prime is 231145451. The next prime is 231145567. The reversal of 231145500 is 5541132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75549 + ... + 78548.

It is an arithmetic number, because the mean of its divisors is an integer number (14022918).

Almost surely, 2^231145500 is an apocalyptic number.

231145500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231145500 is an abundant number, since it is smaller than the sum of its proper divisors (441954564).

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

231145500 is a wasteful number, since it uses less digits than its factorization.

231145500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154119 (or 154107 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 231145500 is about 15203.4699986549. The cubic root of 231145500 is about 613.7080420073.

Adding to 231145500 its reverse (5541132), we get a palindrome (236686632).

The spelling of 231145500 in words is "two hundred thirty-one million, one hundred forty-five thousand, five hundred".