231516064 has 96 divisors (see below), whose sum is σ = 547404480. Its totient is φ = 95219712.

The previous prime is 231516017. The next prime is 231516079. The reversal of 231516064 is 460615132.

231516064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133507 + ... + 135229.

It is an arithmetic number, because the mean of its divisors is an integer number (5702130).

Almost surely, 2^231516064 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 231516064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273702240).

231516064 is an abundant number, since it is smaller than the sum of its proper divisors (315888416).

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

231516064 is a wasteful number, since it uses less digits than its factorization.

231516064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 231516064 is about 15215.6519413399. The cubic root of 231516064 is about 614.0358249918.

The spelling of 231516064 in words is "two hundred thirty-one million, five hundred sixteen thousand, sixty-four".