15500950243 has 4 divisors (see below), whose sum is σ = 16000980928. Its totient is φ = 15000919560.

The previous prime is 15500950169. The next prime is 15500950247. The reversal of 15500950243 is 34205900551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34205900551 = 643 ⋅53197357.

It is a cyclic number.

It is not a de Polignac number, because 15500950243 - 2¹⁷ = 15500819171 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15500950199 and 15500950208.

It is not an unprimeable number, because it can be changed into a prime (15500950247) 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 in 3 ways as a sum of consecutive naturals, for example, 250015296 + ... + 250015357.

It is an arithmetic number, because the mean of its divisors is an integer number (4000245232).

Almost surely, 2^15500950243 is an apocalyptic number.

15500950243 is a deficient number, since it is larger than the sum of its proper divisors (500030685).

15500950243 is an equidigital number, since it uses as much as digits as its factorization.

15500950243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500030684.

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 15500950243 in words is "fifteen billion, five hundred million, nine hundred fifty thousand, two hundred forty-three".