2002611521 has 2 divisors, whose sum is σ = 2002611522. Its totient is φ = 2002611520.

The previous prime is 2002611511. The next prime is 2002611581. The reversal of 2002611521 is 1251162002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1950193921 + 52417600 = 44161^2 + 7240^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002611521 - 2¹⁰ = 2002610497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2002611493 and 2002611502.

It is not a weakly prime, because it can be changed into another prime (2002611511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001305760 + 1001305761.

It is an arithmetic number, because the mean of its divisors is an integer number (1001305761).

Almost surely, 2^2002611521 is an apocalyptic number.

It is an amenable number.

2002611521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002611521 is an equidigital number, since it uses as much as digits as its factorization.

2002611521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2002611521 is about 44750.5477173185. The cubic root of 2002611521 is about 1260.4691964281.

Adding to 2002611521 its reverse (1251162002), we get a palindrome (3253773523).

The spelling of 2002611521 in words is "two billion, two million, six hundred eleven thousand, five hundred twenty-one".