231023031020 has 24 divisors (see below), whose sum is σ = 513686505024. Its totient is φ = 86973376256.

The previous prime is 231023030971. The next prime is 231023031059. The reversal of 231023031020 is 20130320132.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 231023031020.

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, 339739412 + ... + 339740091.

It is an arithmetic number, because the mean of its divisors is an integer number (21403604376).

Almost surely, 2^231023031020 is an apocalyptic number.

231023031020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231023031020 is an abundant number, since it is smaller than the sum of its proper divisors (282663474004).

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

231023031020 is a wasteful number, since it uses less digits than its factorization.

231023031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679479529 (or 679479527 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 231023031020 its reverse (20130320132), we get a palindrome (251153351152).

The spelling of 231023031020 in words is "two hundred thirty-one billion, twenty-three million, thirty-one thousand, twenty".