243113313251 has 2 divisors, whose sum is σ = 243113313252. Its totient is φ = 243113313250.

The previous prime is 243113313217. The next prime is 243113313253. The reversal of 243113313251 is 152313311342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243113313251 - 2²² = 243109118947 is a prime.

It is a Sophie Germain prime.

Together with 243113313253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243113313253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121556656625 + 121556656626.

It is an arithmetic number, because the mean of its divisors is an integer number (121556656626).

Almost surely, 2^243113313251 is an apocalyptic number.

243113313251 is a deficient number, since it is larger than the sum of its proper divisors (1).

243113313251 is an equidigital number, since it uses as much as digits as its factorization.

243113313251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

Adding to 243113313251 its reverse (152313311342), we get a palindrome (395426624593).

The spelling of 243113313251 in words is "two hundred forty-three billion, one hundred thirteen million, three hundred thirteen thousand, two hundred fifty-one".