4152521321 has 4 divisors (see below), whose sum is σ = 4471946052. Its totient is φ = 3833096592.

The previous prime is 4152521293. The next prime is 4152521357. The reversal of 4152521321 is 1231252514.

4152521321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 978438400 + 3174082921 = 31280^2 + 56339^2 .

It is not a de Polignac number, because 4152521321 - 2⁶ = 4152521257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4152521621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159712346 + ... + 159712371.

It is an arithmetic number, because the mean of its divisors is an integer number (1117986513).

Almost surely, 2^4152521321 is an apocalyptic number.

It is an amenable number.

4152521321 is a deficient number, since it is larger than the sum of its proper divisors (319424731).

4152521321 is a wasteful number, since it uses less digits than its factorization.

4152521321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319424730.

The product of its digits is 2400, while the sum is 26.

The square root of 4152521321 is about 64440.0599084141. The cubic root of 4152521321 is about 1607.3259523239.

Adding to 4152521321 its reverse (1231252514), we get a palindrome (5383773835).

The spelling of 4152521321 in words is "four billion, one hundred fifty-two million, five hundred twenty-one thousand, three hundred twenty-one".