231940005 has 32 divisors (see below), whose sum is σ = 406107648. Its totient is φ = 112104000.

The previous prime is 231940003. The next prime is 231940019. The reversal of 231940005 is 500049132.

It is not a de Polignac number, because 231940005 - 2¹ = 231940003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231940001) 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 31 ways as a sum of consecutive naturals, for example, 55230 + ... + 59280.

It is an arithmetic number, because the mean of its divisors is an integer number (12690864).

Almost surely, 2^231940005 is an apocalyptic number.

It is an amenable number.

231940005 is a deficient number, since it is larger than the sum of its proper divisors (174167643).

231940005 is a wasteful number, since it uses less digits than its factorization.

231940005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4417.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 231940005 is about 15229.5766520281. The cubic root of 231940005 is about 614.4103940053.

Adding to 231940005 its reverse (500049132), we get a palindrome (731989137).

It can be divided in two parts, 2319 and 40005, that added together give a palindrome (42324).

The spelling of 231940005 in words is "two hundred thirty-one million, nine hundred forty thousand, five".