2421302521 has 16 divisors (see below), whose sum is σ = 2678457600. Its totient is φ = 2170396800.

The previous prime is 2421302491. The next prime is 2421302531. The reversal of 2421302521 is 1252031242.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2421302521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2421302492 and 2421302501.

It is not an unprimeable number, because it can be changed into a prime (2421302531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 885885 + ... + 888613.

It is an arithmetic number, because the mean of its divisors is an integer number (167403600).

Almost surely, 2^2421302521 is an apocalyptic number.

It is an amenable number.

2421302521 is a deficient number, since it is larger than the sum of its proper divisors (257155079).

2421302521 is a wasteful number, since it uses less digits than its factorization.

2421302521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3840.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2421302521 is about 49206.7324763594. The cubic root of 2421302521 is about 1342.8155178538.

Adding to 2421302521 its reverse (1252031242), we get a palindrome (3673333763).

The spelling of 2421302521 in words is "two billion, four hundred twenty-one million, three hundred two thousand, five hundred twenty-one".