243136326403 has 2 divisors, whose sum is σ = 243136326404. Its totient is φ = 243136326402.

The previous prime is 243136326361. The next prime is 243136326409. The reversal of 243136326403 is 304623631342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243136326403 - 2¹³ = 243136318211 is a prime.

It is not a weakly prime, because it can be changed into another prime (243136326409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121568163201 + 121568163202.

It is an arithmetic number, because the mean of its divisors is an integer number (121568163202).

Almost surely, 2^243136326403 is an apocalyptic number.

243136326403 is a deficient number, since it is larger than the sum of its proper divisors (1).

243136326403 is an equidigital number, since it uses as much as digits as its factorization.

243136326403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 37.

Adding to 243136326403 its reverse (304623631342), we get a palindrome (547759957745).

The spelling of 243136326403 in words is "two hundred forty-three billion, one hundred thirty-six million, three hundred twenty-six thousand, four hundred three".