243320831 has 8 divisors (see below), whose sum is σ = 262172400. Its totient is φ = 224488512.

The previous prime is 243320771. The next prime is 243320849. The reversal of 243320831 is 138023342.

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

It is a cyclic number.

It is not a de Polignac number, because 243320831 - 2¹⁴ = 243304447 is a prime.

It is a super-2 number, since 2×243320831² = 118410053597061122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243320831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243320131) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31820 + ... + 38718.

It is an arithmetic number, because the mean of its divisors is an integer number (32771550).

Almost surely, 2^243320831 is an apocalyptic number.

243320831 is a deficient number, since it is larger than the sum of its proper divisors (18851569).

243320831 is a wasteful number, since it uses less digits than its factorization.

243320831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9625.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 243320831 is about 15598.7445328142. The cubic root of 243320831 is about 624.2996579801.

The spelling of 243320831 in words is "two hundred forty-three million, three hundred twenty thousand, eight hundred thirty-one".