231326464 has 72 divisors (see below), whose sum is σ = 482972672. Its totient is φ = 110453760.

The previous prime is 231326423. The next prime is 231326483. The reversal of 231326464 is 464623132.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 817267 + ... + 817549.

Almost surely, 2^231326464 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 231326464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241486336).

231326464 is an abundant number, since it is smaller than the sum of its proper divisors (251646208).

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

231326464 is a wasteful number, since it uses less digits than its factorization.

231326464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 419 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 231326464 is about 15209.4202387862. The cubic root of 231326464 is about 613.8681577381.

Adding to 231326464 its reverse (464623132), we get a palindrome (695949596).

The spelling of 231326464 in words is "two hundred thirty-one million, three hundred twenty-six thousand, four hundred sixty-four".