5152242421 has 4 divisors (see below), whose sum is σ = 5154734700. Its totient is φ = 5149750144.

The previous prime is 5152242379. The next prime is 5152242449. The reversal of 5152242421 is 1242422515.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1242422515 = 5 ⋅248484503.

It can be written as a sum of positive squares in 2 ways, for example, as 2705456196 + 2446786225 = 52014^2 + 49465^2 .

It is a cyclic number.

It is not a de Polignac number, because 5152242421 - 2¹³ = 5152234229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5152242421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5152242721) 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, 1243036 + ... + 1247173.

It is an arithmetic number, because the mean of its divisors is an integer number (1288683675).

Almost surely, 2^5152242421 is an apocalyptic number.

It is an amenable number.

5152242421 is a deficient number, since it is larger than the sum of its proper divisors (2492279).

5152242421 is a wasteful number, since it uses less digits than its factorization.

5152242421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492278.

The product of its digits is 6400, while the sum is 28.

The square root of 5152242421 is about 71779.1224591106. The cubic root of 5152242421 is about 1727.1581106142.

Adding to 5152242421 its reverse (1242422515), we get a palindrome (6394664936).

The spelling of 5152242421 in words is "five billion, one hundred fifty-two million, two hundred forty-two thousand, four hundred twenty-one".