243022057 has 2 divisors, whose sum is σ = 243022058. Its totient is φ = 243022056.

The previous prime is 243022049. The next prime is 243022067. The reversal of 243022057 is 750220342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233356176 + 9665881 = 15276^2 + 3109^2 .

It is a cyclic number.

It is not a de Polignac number, because 243022057 - 2³ = 243022049 is a prime.

It is a super-2 number, since 2×243022057² = 118119440377022498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243022067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121511028 + 121511029.

It is an arithmetic number, because the mean of its divisors is an integer number (121511029).

Almost surely, 2^243022057 is an apocalyptic number.

It is an amenable number.

243022057 is a deficient number, since it is larger than the sum of its proper divisors (1).

243022057 is an equidigital number, since it uses as much as digits as its factorization.

243022057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 243022057 is about 15589.1647306711. The cubic root of 243022057 is about 624.0440271710.

Adding to 243022057 its reverse (750220342), we get a palindrome (993242399).

The spelling of 243022057 in words is "two hundred forty-three million, twenty-two thousand, fifty-seven".