231400064 has 64 divisors (see below), whose sum is σ = 539784000. Its totient is φ = 96737280.

The previous prime is 231400063. The next prime is 231400093. The reversal of 231400064 is 460004132.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (231400061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33587 + ... + 39885.

It is an arithmetic number, because the mean of its divisors is an integer number (8434125).

Almost surely, 2^231400064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231400064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269892000).

231400064 is an abundant number, since it is smaller than the sum of its proper divisors (308383936).

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

231400064 is an equidigital number, since it uses as much as digits as its factorization.

231400064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6361 (or 6349 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 231400064 is about 15211.8395994699. The cubic root of 231400064 is about 613.9332546360.

Adding to 231400064 its reverse (460004132), we get a palindrome (691404196).

The spelling of 231400064 in words is "two hundred thirty-one million, four hundred thousand, sixty-four".