231145252 has 24 divisors (see below), whose sum is σ = 439701696. Its totient is φ = 105682848.

The previous prime is 231145237. The next prime is 231145273. The reversal of 231145252 is 252541132.

231145252 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

231145252 is strictly pandigital in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15208 + ... + 26335.

It is an arithmetic number, because the mean of its divisors is an integer number (18320904).

Almost surely, 2^231145252 is an apocalyptic number.

It is an amenable number.

231145252 is a deficient number, since it is larger than the sum of its proper divisors (208556444).

231145252 is a wasteful number, since it uses less digits than its factorization.

231145252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41667 (or 41665 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 231145252 is about 15203.4618426199. The cubic root of 231145252 is about 613.7078225213.

Adding to 231145252 its reverse (252541132), we get a palindrome (483686384).

The spelling of 231145252 in words is "two hundred thirty-one million, one hundred forty-five thousand, two hundred fifty-two".