231005423 has 8 divisors (see below), whose sum is σ = 257368320. Its totient is φ = 205536280.

The previous prime is 231005419. The next prime is 231005431. The reversal of 231005423 is 324500132.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 231005423 - 2² = 231005419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231005395 and 231005404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231005443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222893 + ... + 223926.

It is an arithmetic number, because the mean of its divisors is an integer number (32171040).

Almost surely, 2^231005423 is an apocalyptic number.

231005423 is a deficient number, since it is larger than the sum of its proper divisors (26362897).

231005423 is a wasteful number, since it uses less digits than its factorization.

231005423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446877.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 231005423 is about 15198.8625561257. The cubic root of 231005423 is about 613.5840454297.

Adding to 231005423 its reverse (324500132), we get a palindrome (555505555).

The spelling of 231005423 in words is "two hundred thirty-one million, five thousand, four hundred twenty-three".