231140445 has 8 divisors (see below), whose sum is σ = 369824736. Its totient is φ = 123274896.

The previous prime is 231140423. The next prime is 231140477. The reversal of 231140445 is 544041132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231140445 - 2⁹ = 231139933 is a prime.

It is a congruent number.

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, 7704667 + ... + 7704696.

It is an arithmetic number, because the mean of its divisors is an integer number (46228092).

Almost surely, 2^231140445 is an apocalyptic number.

It is an amenable number.

231140445 is a deficient number, since it is larger than the sum of its proper divisors (138684291).

231140445 is a wasteful number, since it uses less digits than its factorization.

231140445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15409371.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 231140445 is about 15203.3037528032. The cubic root of 231140445 is about 613.7035681777.

Adding to 231140445 its reverse (544041132), we get a palindrome (775181577).

The spelling of 231140445 in words is "two hundred thirty-one million, one hundred forty thousand, four hundred forty-five".