231323405 has 8 divisors (see below), whose sum is σ = 277711200. Its totient is φ = 184976656.

The previous prime is 231323381. The next prime is 231323413. The reversal of 231323405 is 504323132.

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 231323405 - 2⁶ = 231323341 is a prime.

It is a congruent number.

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, 3926 + ... + 21864.

It is an arithmetic number, because the mean of its divisors is an integer number (34713900).

Almost surely, 2^231323405 is an apocalyptic number.

It is an amenable number.

231323405 is a deficient number, since it is larger than the sum of its proper divisors (46387795).

231323405 is a wasteful number, since it uses less digits than its factorization.

231323405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20523.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 231323405 is about 15209.3196757777. The cubic root of 231323405 is about 613.8654518495.

Adding to 231323405 its reverse (504323132), we get a palindrome (735646537).

The spelling of 231323405 in words is "two hundred thirty-one million, three hundred twenty-three thousand, four hundred five".