231231022 has 8 divisors (see below), whose sum is σ = 378378072. Its totient is φ = 105105000.

The previous prime is 231231017. The next prime is 231231031. The reversal of 231231022 is 220132132.

231231022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 231230987 and 231231005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5255229 + ... + 5255272.

It is an arithmetic number, because the mean of its divisors is an integer number (47297259).

Almost surely, 2^231231022 is an apocalyptic number.

231231022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231231022 is a deficient number, since it is larger than the sum of its proper divisors (147147050).

231231022 is a wasteful number, since it uses less digits than its factorization.

231231022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10510514.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231231022 is about 15206.2823201465. The cubic root of 231231022 is about 613.7837217090.

Adding to 231231022 its reverse (220132132), we get a palindrome (451363154).

The spelling of 231231022 in words is "two hundred thirty-one million, two hundred thirty-one thousand, twenty-two".