231004325664 has 144 divisors (see below), whose sum is σ = 751007799360. Its totient is φ = 65979809280.

The previous prime is 231004325647. The next prime is 231004325683. The reversal of 231004325664 is 466523400132.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6815319 + ... + 6849129.

It is an arithmetic number, because the mean of its divisors is an integer number (5215331940).

Almost surely, 2^231004325664 is an apocalyptic number.

231004325664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231004325664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375503899680).

231004325664 is an abundant number, since it is smaller than the sum of its proper divisors (520003473696).

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

231004325664 is a wasteful number, since it uses less digits than its factorization.

231004325664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37223 (or 37212 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 231004325664 its reverse (466523400132), we get a palindrome (697527725796).

The spelling of 231004325664 in words is "two hundred thirty-one billion, four million, three hundred twenty-five thousand, six hundred sixty-four".