231906812 has 6 divisors (see below), whose sum is σ = 405836928. Its totient is φ = 115953404.

The previous prime is 231906797. The next prime is 231906821. The reversal of 231906812 is 218609132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28988348 + ... + 28988355.

It is an arithmetic number, because the mean of its divisors is an integer number (67639488).

Almost surely, 2^231906812 is an apocalyptic number.

It is an amenable number.

231906812 is a deficient number, since it is larger than the sum of its proper divisors (173930116).

231906812 is a wasteful number, since it uses less digits than its factorization.

231906812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57976707 (or 57976705 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 231906812 is about 15228.4868585162. The cubic root of 231906812 is about 614.3810831250.

The spelling of 231906812 in words is "two hundred thirty-one million, nine hundred six thousand, eight hundred twelve".