243235065631 has 2 divisors, whose sum is σ = 243235065632. Its totient is φ = 243235065630.

The previous prime is 243235065611. The next prime is 243235065649. The reversal of 243235065631 is 136560532342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243235065631 - 2²¹ = 243232968479 is a prime.

It is a super-2 number, since 2×243235065631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243235065611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121617532815 + 121617532816.

It is an arithmetic number, because the mean of its divisors is an integer number (121617532816).

Almost surely, 2^243235065631 is an apocalyptic number.

243235065631 is a deficient number, since it is larger than the sum of its proper divisors (1).

243235065631 is an equidigital number, since it uses as much as digits as its factorization.

243235065631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 40.

Adding to 243235065631 its reverse (136560532342), we get a palindrome (379795597973).

The spelling of 243235065631 in words is "two hundred forty-three billion, two hundred thirty-five million, sixty-five thousand, six hundred thirty-one".