231405364 has 6 divisors (see below), whose sum is σ = 404959394. Its totient is φ = 115702680.

The previous prime is 231405347. The next prime is 231405397. The reversal of 231405364 is 463504132.

It can be written as a sum of positive squares in only one way, i.e., 204261264 + 27144100 = 14292^2 + 5210^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 28925667 + ... + 28925674.

Almost surely, 2^231405364 is an apocalyptic number.

It is an amenable number.

231405364 is a deficient number, since it is larger than the sum of its proper divisors (173554030).

231405364 is a wasteful number, since it uses less digits than its factorization.

231405364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57851345 (or 57851343 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 231405364 is about 15212.0138048846. The cubic root of 231405364 is about 613.9379417874.

Adding to 231405364 its reverse (463504132), we get a palindrome (694909496).

The spelling of 231405364 in words is "two hundred thirty-one million, four hundred five thousand, three hundred sixty-four".