243320331 has 8 divisors (see below), whose sum is σ = 325625344. Its totient is φ = 161614440.

The previous prime is 243320309. The next prime is 243320339. The reversal of 243320331 is 133023342.

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

It is not a de Polignac number, because 243320331 - 2⁶ = 243320267 is a prime.

It is a super-2 number, since 2×243320331² = 118409566955899122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243320298 and 243320307.

It is not an unprimeable number, because it can be changed into a prime (243320339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148831 + ... + 150456.

It is an arithmetic number, because the mean of its divisors is an integer number (40703168).

Almost surely, 2^243320331 is an apocalyptic number.

243320331 is a deficient number, since it is larger than the sum of its proper divisors (82305013).

243320331 is a wasteful number, since it uses less digits than its factorization.

243320331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299561.

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 243320331 is about 15598.7285058751. The cubic root of 243320331 is about 624.2992303554.

Adding to 243320331 its reverse (133023342), we get a palindrome (376343673).

The spelling of 243320331 in words is "two hundred forty-three million, three hundred twenty thousand, three hundred thirty-one".