5143231521 has 12 divisors (see below), whose sum is σ = 7429736340. Its totient is φ = 3428532960.

The previous prime is 5143231487. The next prime is 5143231553. The reversal of 5143231521 is 1251323415.

It can be written as a sum of positive squares in 2 ways, for example, as 3676724496 + 1466507025 = 60636^2 + 38295^2 .

It is not a de Polignac number, because 5143231521 - 2⁷ = 5143231393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5143238521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183295 + ... + 209483.

It is an arithmetic number, because the mean of its divisors is an integer number (619144695).

Almost surely, 2^5143231521 is an apocalyptic number.

It is an amenable number.

5143231521 is a deficient number, since it is larger than the sum of its proper divisors (2286504819).

5143231521 is a wasteful number, since it uses less digits than its factorization.

5143231521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48016 (or 48013 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 5143231521 is about 71716.3267394531. The cubic root of 5143231521 is about 1726.1506314384.

Adding to 5143231521 its reverse (1251323415), we get a palindrome (6394554936).

The spelling of 5143231521 in words is "five billion, one hundred forty-three million, two hundred thirty-one thousand, five hundred twenty-one".