231022340 has 12 divisors (see below), whose sum is σ = 485146956. Its totient is φ = 92408928.

The previous prime is 231022321. The next prime is 231022361. The reversal of 231022340 is 43220132.

231022340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47582404 + 183439936 = 6898^2 + 13544^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5775539 + ... + 5775578.

It is an arithmetic number, because the mean of its divisors is an integer number (40428913).

Almost surely, 2^231022340 is an apocalyptic number.

231022340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231022340 is an abundant number, since it is smaller than the sum of its proper divisors (254124616).

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

231022340 is a wasteful number, since it uses less digits than its factorization.

231022340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11551126 (or 11551124 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 231022340 is about 15199.4190678460. The cubic root of 231022340 is about 613.5990230693.

Adding to 231022340 its reverse (43220132), we get a palindrome (274242472).

The spelling of 231022340 in words is "two hundred thirty-one million, twenty-two thousand, three hundred forty".