243115152431 has 2 divisors, whose sum is σ = 243115152432. Its totient is φ = 243115152430.

The previous prime is 243115152419. The next prime is 243115152433. The reversal of 243115152431 is 134251511342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243115152431 - 2¹⁸ = 243114890287 is a prime.

It is a super-2 number, since 2×243115152431² (a number of 24 digits) contains 22 as substring.

Together with 243115152433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243115152433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121557576215 + 121557576216.

It is an arithmetic number, because the mean of its divisors is an integer number (121557576216).

Almost surely, 2^243115152431 is an apocalyptic number.

243115152431 is a deficient number, since it is larger than the sum of its proper divisors (1).

243115152431 is an equidigital number, since it uses as much as digits as its factorization.

243115152431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

Adding to 243115152431 its reverse (134251511342), we get a palindrome (377366663773).

The spelling of 243115152431 in words is "two hundred forty-three billion, one hundred fifteen million, one hundred fifty-two thousand, four hundred thirty-one".