231025664 has 22 divisors (see below), whose sum is σ = 461827764. Its totient is φ = 115512320.

The previous prime is 231025661. The next prime is 231025673. The reversal of 231025664 is 466520132.

It is not an unprimeable number, because it can be changed into a prime (231025661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111782 + ... + 113829.

Almost surely, 2^231025664 is an apocalyptic number.

It is an amenable number.

231025664 is a deficient number, since it is larger than the sum of its proper divisors (230802100).

231025664 is an equidigital number, since it uses as much as digits as its factorization.

231025664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225631 (or 225613 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 231025664 is about 15199.5284137371. The cubic root of 231025664 is about 613.6019659209.

Adding to 231025664 its reverse (466520132), we get a palindrome (697545796).

The spelling of 231025664 in words is "two hundred thirty-one million, twenty-five thousand, six hundred sixty-four".