15540450203 has 2 divisors, whose sum is σ = 15540450204. Its totient is φ = 15540450202.

The previous prime is 15540450169. The next prime is 15540450209. The reversal of 15540450203 is 30205404551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15540450203 - 2¹² = 15540446107 is a prime.

It is not a weakly prime, because it can be changed into another prime (15540450209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7770225101 + 7770225102.

It is an arithmetic number, because the mean of its divisors is an integer number (7770225102).

Almost surely, 2^15540450203 is an apocalyptic number.

15540450203 is a deficient number, since it is larger than the sum of its proper divisors (1).

15540450203 is an equidigital number, since it uses as much as digits as its factorization.

15540450203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 15540450203 its reverse (30205404551), we get a palindrome (45745854754).

The spelling of 15540450203 in words is "fifteen billion, five hundred forty million, four hundred fifty thousand, two hundred three".