231217704 has 24 divisors (see below), whose sum is σ = 626214810. Its totient is φ = 77072544.

The previous prime is 231217703. The next prime is 231217711. The reversal of 231217704 is 407712132.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 229522500 + 1695204 = 15150^2 + 1302^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (231217703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1605607 + ... + 1605750.

Almost surely, 2^231217704 is an apocalyptic number.

231217704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231217704 is an abundant number, since it is smaller than the sum of its proper divisors (394997106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231217704 is a wasteful number, since it uses less digits than its factorization.

231217704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211369 (or 3211362 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 231217704 is about 15205.8444027288. The cubic root of 231217704 is about 613.7719376377.

Adding to 231217704 its reverse (407712132), we get a palindrome (638929836).

The spelling of 231217704 in words is "two hundred thirty-one million, two hundred seventeen thousand, seven hundred four".