231330405 has 16 divisors (see below), whose sum is σ = 379157184. Its totient is φ = 120366720.

The previous prime is 231330383. The next prime is 231330409. The reversal of 231330405 is 504033132.

It is not a de Polignac number, because 231330405 - 2¹⁴ = 231314021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231330409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187459 + ... + 188688.

It is an arithmetic number, because the mean of its divisors is an integer number (23697324).

Almost surely, 2^231330405 is an apocalyptic number.

It is an amenable number.

231330405 is a deficient number, since it is larger than the sum of its proper divisors (147826779).

231330405 is a wasteful number, since it uses less digits than its factorization.

231330405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376196.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 231330405 is about 15209.5497960985. The cubic root of 231330405 is about 613.8716437792.

Adding to 231330405 its reverse (504033132), we get a palindrome (735363537).

The spelling of 231330405 in words is "two hundred thirty-one million, three hundred thirty thousand, four hundred five".