243322031 has 2 divisors, whose sum is σ = 243322032. Its totient is φ = 243322030.

The previous prime is 243322021. The next prime is 243322073. The reversal of 243322031 is 130223342.

243322031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243322031 is a prime.

It is a super-2 number, since 2×243322031² = 118411221539929922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243321994 and 243322012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243322021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121661015 + 121661016.

It is an arithmetic number, because the mean of its divisors is an integer number (121661016).

Almost surely, 2^243322031 is an apocalyptic number.

243322031 is a deficient number, since it is larger than the sum of its proper divisors (1).

243322031 is an equidigital number, since it uses as much as digits as its factorization.

243322031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 243322031 is about 15598.7829974008. The cubic root of 243322031 is about 624.3006842772.

Adding to 243322031 its reverse (130223342), we get a palindrome (373545373).

The spelling of 243322031 in words is "two hundred forty-three million, three hundred twenty-two thousand, thirty-one".