1303530131523 has 4 divisors (see below), whose sum is σ = 1738040175368. Its totient is φ = 869020087680.

The previous prime is 1303530131483. The next prime is 1303530131531. The reversal of 1303530131523 is 3251310353031.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1303530131523 - 2⁹ = 1303530131011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1303530131543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217255021918 + ... + 217255021923.

It is an arithmetic number, because the mean of its divisors is an integer number (434510043842).

Almost surely, 2^{1303530131523} is an apocalyptic number.

1303530131523 is a deficient number, since it is larger than the sum of its proper divisors (434510043845).

1303530131523 is an equidigital number, since it uses as much as digits as its factorization.

1303530131523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434510043844.

The product of its (nonzero) digits is 12150, while the sum is 30.

Adding to 1303530131523 its reverse (3251310353031), we get a palindrome (4554840484554).

The spelling of 1303530131523 in words is "one trillion, three hundred three billion, five hundred thirty million, one hundred thirty-one thousand, five hundred twenty-three".