231430664 has 8 divisors (see below), whose sum is σ = 433932510. Its totient is φ = 115715328.

The previous prime is 231430649. The next prime is 231430699. The reversal of 231430664 is 466034132.

It can be written as a sum of positive squares in only one way, i.e., 167909764 + 63520900 = 12958^2 + 7970^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 14464409 + ... + 14464424.

Almost surely, 2^231430664 is an apocalyptic number.

It is an amenable number.

231430664 is a deficient number, since it is larger than the sum of its proper divisors (202501846).

231430664 is a wasteful number, since it uses less digits than its factorization.

231430664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28928839 (or 28928835 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 231430664 is about 15212.8453617330. The cubic root of 231430664 is about 613.9603153165.

Adding to 231430664 its reverse (466034132), we get a palindrome (697464796).

The spelling of 231430664 in words is "two hundred thirty-one million, four hundred thirty thousand, six hundred sixty-four".