231332645 has 8 divisors (see below), whose sum is σ = 277685880. Its totient is φ = 185008320.

The previous prime is 231332611. The next prime is 231332663. The reversal of 231332645 is 546233132.

It can be written as a sum of positive squares in 4 ways, for example, as 23338561 + 207994084 = 4831^2 + 14422^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-231332645 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19115 + ... + 28775.

It is an arithmetic number, because the mean of its divisors is an integer number (34710735).

Almost surely, 2^231332645 is an apocalyptic number.

It is an amenable number.

231332645 is a deficient number, since it is larger than the sum of its proper divisors (46353235).

231332645 is an equidigital number, since it uses as much as digits as its factorization.

231332645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14455.

The product of its digits is 12960, while the sum is 29.

The square root of 231332645 is about 15209.6234338658. The cubic root of 231332645 is about 613.8736251704.

Adding to 231332645 its reverse (546233132), we get a palindrome (777565777).

The spelling of 231332645 in words is "two hundred thirty-one million, three hundred thirty-two thousand, six hundred forty-five".