5243512421 has 4 divisors (see below), whose sum is σ = 5992585632. Its totient is φ = 4494439212.

The previous prime is 5243512409. The next prime is 5243512457. The reversal of 5243512421 is 1242153425.

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 not a de Polignac number, because 5243512421 - 2⁶ = 5243512357 is a prime.

It is a super-3 number, since 3×5243512421³ (a number of 30 digits) contains 333 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 (5243512121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374536595 + ... + 374536608.

It is an arithmetic number, because the mean of its divisors is an integer number (1498146408).

Almost surely, 2^5243512421 is an apocalyptic number.

It is an amenable number.

5243512421 is a deficient number, since it is larger than the sum of its proper divisors (749073211).

5243512421 is an equidigital number, since it uses as much as digits as its factorization.

5243512421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749073210.

The product of its digits is 9600, while the sum is 29.

The square root of 5243512421 is about 72412.1013436290. The cubic root of 5243512421 is about 1737.2971226711.

Adding to 5243512421 its reverse (1242153425), we get a palindrome (6485665846).

The spelling of 5243512421 in words is "five billion, two hundred forty-three million, five hundred twelve thousand, four hundred twenty-one".