231163028 has 24 divisors (see below), whose sum is σ = 410620392. Its totient is φ = 113854464.

The previous prime is 231162989. The next prime is 231163033. The reversal of 231163028 is 820361132.

It can be written as a sum of positive squares in 4 ways, for example, as 6822544 + 224340484 = 2612^2 + 14978^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231162988 and 231163006.

It is a congruent number.

It is an unprimeable number.

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, 89126 + ... + 91682.

It is an arithmetic number, because the mean of its divisors is an integer number (17109183).

Almost surely, 2^231163028 is an apocalyptic number.

It is an amenable number.

231163028 is a deficient number, since it is larger than the sum of its proper divisors (179457364).

231163028 is a wasteful number, since it uses less digits than its factorization.

231163028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891 (or 2889 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 231163028 is about 15204.0464350777. The cubic root of 231163028 is about 613.7235543184.

The spelling of 231163028 in words is "two hundred thirty-one million, one hundred sixty-three thousand, twenty-eight".