231664406 has 8 divisors (see below), whose sum is σ = 367937640. Its totient is φ = 109018528.

The previous prime is 231664403. The next prime is 231664417. The reversal of 231664406 is 604466132.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231664403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3406796 + ... + 3406863.

It is an arithmetic number, because the mean of its divisors is an integer number (45992205).

Almost surely, 2^231664406 is an apocalyptic number.

231664406 is a deficient number, since it is larger than the sum of its proper divisors (136273234).

231664406 is a wasteful number, since it uses less digits than its factorization.

231664406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6813678.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 231664406 is about 15220.5258122050. The cubic root of 231664406 is about 614.1669431142.

It can be divided in two parts, 23166 and 4406, that added together give a palindrome (27572).

The spelling of 231664406 in words is "two hundred thirty-one million, six hundred sixty-four thousand, four hundred six".