231023403 has 12 divisors (see below), whose sum is σ = 359369920. Its totient is φ = 142168176.

The previous prime is 231023399. The next prime is 231023407. The reversal of 231023403 is 304320132.

231023403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231023399) and next prime (231023407).

It is not a de Polignac number, because 231023403 - 2² = 231023399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231023407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 987163 + ... + 987396.

Almost surely, 2^231023403 is an apocalyptic number.

231023403 is a deficient number, since it is larger than the sum of its proper divisors (128346517).

231023403 is a wasteful number, since it uses less digits than its factorization.

231023403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974578 (or 1974575 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 231023403 is about 15199.4540362475. The cubic root of 231023403 is about 613.5999641829.

Adding to 231023403 its reverse (304320132), we get a palindrome (535343535).

The spelling of 231023403 in words is "two hundred thirty-one million, twenty-three thousand, four hundred three".