243350021503 has 2 divisors, whose sum is σ = 243350021504. Its totient is φ = 243350021502.

The previous prime is 243350021443. The next prime is 243350021507. The reversal of 243350021503 is 305120053342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243350021503 - 2¹³ = 243350013311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243350021507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121675010751 + 121675010752.

It is an arithmetic number, because the mean of its divisors is an integer number (121675010752).

Almost surely, 2^243350021503 is an apocalyptic number.

243350021503 is a deficient number, since it is larger than the sum of its proper divisors (1).

243350021503 is an equidigital number, since it uses as much as digits as its factorization.

243350021503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 243350021503 its reverse (305120053342), we get a palindrome (548470074845).

The spelling of 243350021503 in words is "two hundred forty-three billion, three hundred fifty million, twenty-one thousand, five hundred three".