521130144503 has 8 divisors (see below), whose sum is σ = 530531765520. Its totient is φ = 511756217280.

The previous prime is 521130144499. The next prime is 521130144529. The reversal of 521130144503 is 305441031125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521130144503 - 2² = 521130144499 is a prime.

It is a super-2 number, since 2×521130144503² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521130146503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6885473 + ... + 6960746.

It is an arithmetic number, because the mean of its divisors is an integer number (66316470690).

Almost surely, 2^521130144503 is an apocalyptic number.

521130144503 is a deficient number, since it is larger than the sum of its proper divisors (9401621017).

521130144503 is a wasteful number, since it uses less digits than its factorization.

521130144503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13846897.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 521130144503 its reverse (305441031125), we get a palindrome (826571175628).

The spelling of 521130144503 in words is "five hundred twenty-one billion, one hundred thirty million, one hundred forty-four thousand, five hundred three".