231326404 has 6 divisors (see below), whose sum is σ = 404821214. Its totient is φ = 115663200.

The previous prime is 231326401. The next prime is 231326419. The reversal of 231326404 is 404623132.

It can be written as a sum of positive squares in only one way, i.e., 226442304 + 4884100 = 15048^2 + 2210^2 .

It is a super-4 number, since 4×231326404⁴ (a number of 35 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (231326401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28915797 + ... + 28915804.

Almost surely, 2^231326404 is an apocalyptic number.

It is an amenable number.

231326404 is a deficient number, since it is larger than the sum of its proper divisors (173494810).

231326404 is a wasteful number, since it uses less digits than its factorization.

231326404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57831605 (or 57831603 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 231326404 is about 15209.4182663243. The cubic root of 231326404 is about 613.8681046644.

Adding to 231326404 its reverse (404623132), we get a palindrome (635949536).

The spelling of 231326404 in words is "two hundred thirty-one million, three hundred twenty-six thousand, four hundred four".