231322740 has 192 divisors, whose sum is σ = 764225280. Its totient is φ = 51650560.

The previous prime is 231322703. The next prime is 231322759. The reversal of 231322740 is 47223132.

It is a super-2 number, since 2×231322740² = 107020420082215200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231322740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 594466 + ... + 594854.

It is an arithmetic number, because the mean of its divisors is an integer number (3980340).

Almost surely, 2^231322740 is an apocalyptic number.

231322740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231322740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382112640).

231322740 is an abundant number, since it is smaller than the sum of its proper divisors (532902540).

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

231322740 is a wasteful number, since it uses less digits than its factorization.

231322740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 231322740 is about 15209.2978141662. The cubic root of 231322740 is about 613.8648636097.

Adding to 231322740 its reverse (47223132), we get a palindrome (278545872).

The spelling of 231322740 in words is "two hundred thirty-one million, three hundred twenty-two thousand, seven hundred forty".