231283228 has 24 divisors (see below), whose sum is σ = 442237824. Its totient is φ = 104962800.

The previous prime is 231283201. The next prime is 231283229. The reversal of 231283228 is 822382132.

It is a self number, because there is not a number n which added to its sum of digits gives 231283228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231283229) 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 7 ways as a sum of consecutive naturals, for example, 26601 + ... + 34207.

It is an arithmetic number, because the mean of its divisors is an integer number (18426576).

Almost surely, 2^231283228 is an apocalyptic number.

It is an amenable number.

231283228 is a deficient number, since it is larger than the sum of its proper divisors (210954596).

231283228 is a wasteful number, since it uses less digits than its factorization.

231283228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8313 (or 8311 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 231283228 is about 15207.9988164124. The cubic root of 231283228 is about 613.8299104102.

The spelling of 231283228 in words is "two hundred thirty-one million, two hundred eighty-three thousand, two hundred twenty-eight".