2002152521 has 4 divisors (see below), whose sum is σ = 2003115792. Its totient is φ = 2001189252.

The previous prime is 2002152497. The next prime is 2002152527. The reversal of 2002152521 is 1252512002.

It is a happy number.

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 2002152521 - 2¹⁰ = 2002151497 is a prime.

It is a super-2 number, since 2×2002152521² = 8017229434693310882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002152493 and 2002152502.

It is not an unprimeable number, because it can be changed into a prime (2002152527) 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, 478511 + ... + 482676.

It is an arithmetic number, because the mean of its divisors is an integer number (500778948).

Almost surely, 2^2002152521 is an apocalyptic number.

It is an amenable number.

2002152521 is a deficient number, since it is larger than the sum of its proper divisors (963271).

2002152521 is an equidigital number, since it uses as much as digits as its factorization.

2002152521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963270.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2002152521 is about 44745.4189945742. The cubic root of 2002152521 is about 1260.3728889212.

Adding to 2002152521 its reverse (1252512002), we get a palindrome (3254664523).

The spelling of 2002152521 in words is "two billion, two million, one hundred fifty-two thousand, five hundred twenty-one".