243232323457 has 2 divisors, whose sum is σ = 243232323458. Its totient is φ = 243232323456.

The previous prime is 243232323437. The next prime is 243232323463. The reversal of 243232323457 is 754323232342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192278742016 + 50953581441 = 438496^2 + 225729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243232323457 is a prime.

It is not a weakly prime, because it can be changed into another prime (243232323437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121616161728 + 121616161729.

It is an arithmetic number, because the mean of its divisors is an integer number (121616161729).

Almost surely, 2^243232323457 is an apocalyptic number.

It is an amenable number.

243232323457 is a deficient number, since it is larger than the sum of its proper divisors (1).

243232323457 is an equidigital number, since it uses as much as digits as its factorization.

243232323457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 40.

Adding to 243232323457 its reverse (754323232342), we get a palindrome (997555555799).

The spelling of 243232323457 in words is "two hundred forty-three billion, two hundred thirty-two million, three hundred twenty-three thousand, four hundred fifty-seven".