231242847 has 16 divisors (see below), whose sum is σ = 336711168. Its totient is φ = 139998080.

The previous prime is 231242831. The next prime is 231242917. The reversal of 231242847 is 748242132.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 231242847 - 2⁴ = 231242831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231242827) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 33223 + ... + 39575.

It is an arithmetic number, because the mean of its divisors is an integer number (21044448).

Almost surely, 2^231242847 is an apocalyptic number.

231242847 is a deficient number, since it is larger than the sum of its proper divisors (105468321).

231242847 is a wasteful number, since it uses less digits than its factorization.

231242847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7470.

The product of its digits is 21504, while the sum is 33.

The square root of 231242847 is about 15206.6711347356. The cubic root of 231242847 is about 613.7941843604.

Adding to 231242847 its reverse (748242132), we get a palindrome (979484979).

The spelling of 231242847 in words is "two hundred thirty-one million, two hundred forty-two thousand, eight hundred forty-seven".