231322045 has 4 divisors (see below), whose sum is σ = 277586460. Its totient is φ = 185057632.

The previous prime is 231322037. The next prime is 231322081. The reversal of 231322045 is 540223132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33385284 + 197936761 = 5778^2 + 14069^2 .

It is a cyclic number.

It is not a de Polignac number, because 231322045 - 2³ = 231322037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23132200 + ... + 23132209.

It is an arithmetic number, because the mean of its divisors is an integer number (69396615).

Almost surely, 2^231322045 is an apocalyptic number.

It is an amenable number.

231322045 is a deficient number, since it is larger than the sum of its proper divisors (46264415).

231322045 is an equidigital number, since it uses as much as digits as its factorization.

231322045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46264414.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 231322045 is about 15209.2749662829. The cubic root of 231322045 is about 613.8642488315.

Adding to 231322045 its reverse (540223132), we get a palindrome (771545177).

The spelling of 231322045 in words is "two hundred thirty-one million, three hundred twenty-two thousand, forty-five".