231000812 has 24 divisors (see below), whose sum is σ = 469835520. Its totient is φ = 97321680.

The previous prime is 231000787. The next prime is 231000853. The reversal of 231000812 is 218000132.

231000812 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231000812² = 106722750289318688, which contains 22 as substring.

231000812 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68264 + ... + 71567.

It is an arithmetic number, because the mean of its divisors is an integer number (19576480).

Almost surely, 2^231000812 is an apocalyptic number.

It is an amenable number.

231000812 is an abundant number, since it is smaller than the sum of its proper divisors (238834708).

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

231000812 is a wasteful number, since it uses less digits than its factorization.

231000812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139901 (or 139899 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 231000812 is about 15198.7108663860. The cubic root of 231000812 is about 613.5799629067.

Adding to 231000812 its reverse (218000132), we get a palindrome (449000944).

The spelling of 231000812 in words is "two hundred thirty-one million, eight hundred twelve", and thus it is an aban number.