531103230521 has 4 divisors (see below), whose sum is σ = 531116601600. Its totient is φ = 531089859444.

The previous prime is 531103230503. The next prime is 531103230547. The reversal of 531103230521 is 125032301135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531103230521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531103200521) 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 3 ways as a sum of consecutive naturals, for example, 6625781 + ... + 6705458.

It is an arithmetic number, because the mean of its divisors is an integer number (132779150400).

Almost surely, 2^531103230521 is an apocalyptic number.

It is an amenable number.

531103230521 is a deficient number, since it is larger than the sum of its proper divisors (13371079).

531103230521 is a wasteful number, since it uses less digits than its factorization.

531103230521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13371078.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 531103230521 its reverse (125032301135), we get a palindrome (656135531656).

The spelling of 531103230521 in words is "five hundred thirty-one billion, one hundred three million, two hundred thirty thousand, five hundred twenty-one".