131223343503 has 16 divisors (see below), whose sum is σ = 208653267456. Its totient is φ = 71724560160.

The previous prime is 131223343483. The next prime is 131223343513. The reversal of 131223343503 is 305343322131.

It is not a de Polignac number, because 131223343503 - 2¹⁰ = 131223342479 is a prime.

It is a super-2 number, since 2×131223343503² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223343513) 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 in 15 ways as a sum of consecutive naturals, for example, 135841488 + ... + 135842453.

It is an arithmetic number, because the mean of its divisors is an integer number (13040829216).

Almost surely, 2^131223343503 is an apocalyptic number.

131223343503 is a deficient number, since it is larger than the sum of its proper divisors (77429923953).

131223343503 is a wasteful number, since it uses less digits than its factorization.

131223343503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271683974.

The product of its (nonzero) digits is 19440, while the sum is 30.

Adding to 131223343503 its reverse (305343322131), we get a palindrome (436566665634).

The spelling of 131223343503 in words is "one hundred thirty-one billion, two hundred twenty-three million, three hundred forty-three thousand, five hundred three".