231323031009 has 40 divisors (see below), whose sum is σ = 395418141888. Its totient is φ = 132018478560.

The previous prime is 231323030993. The next prime is 231323031041. The reversal of 231323031009 is 900130323132.

231323031009 is a `hidden beast` number, since 2 + 313 + 2 + 30 + 310 + 0 + 9 = 666.

It is not a de Polignac number, because 231323031009 - 2⁴ = 231323030993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231323031089) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 195954 + ... + 707844.

Almost surely, 2^231323031009 is an apocalyptic number.

It is an amenable number.

231323031009 is a deficient number, since it is larger than the sum of its proper divisors (164095110879).

231323031009 is an equidigital number, since it uses as much as digits as its factorization.

231323031009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512707 (or 512698 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The spelling of 231323031009 in words is "two hundred thirty-one billion, three hundred twenty-three million, thirty-one thousand, nine".