15530450203 has 2 divisors, whose sum is σ = 15530450204. Its totient is φ = 15530450202.

The previous prime is 15530450191. The next prime is 15530450219. The reversal of 15530450203 is 30205403551.

It is a weak prime.

It is an emirp because it is prime and its reverse (30205403551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15530450203 - 2²¹ = 15528353051 is a prime.

It is not a weakly prime, because it can be changed into another prime (15530450233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7765225101 + 7765225102.

It is an arithmetic number, because the mean of its divisors is an integer number (7765225102).

Almost surely, 2^15530450203 is an apocalyptic number.

15530450203 is a deficient number, since it is larger than the sum of its proper divisors (1).

15530450203 is an equidigital number, since it uses as much as digits as its factorization.

15530450203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 28.

Adding to 15530450203 its reverse (30205403551), we get a palindrome (45735853754).

The spelling of 15530450203 in words is "fifteen billion, five hundred thirty million, four hundred fifty thousand, two hundred three".