2013330521 has 2 divisors, whose sum is σ = 2013330522. Its totient is φ = 2013330520.

The previous prime is 2013330479. The next prime is 2013330533. The reversal of 2013330521 is 1250333102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1826707600 + 186622921 = 42740^2 + 13661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2013330521 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2013330493 and 2013330502.

It is not a weakly prime, because it can be changed into another prime (2013330541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006665260 + 1006665261.

It is an arithmetic number, because the mean of its divisors is an integer number (1006665261).

Almost surely, 2^2013330521 is an apocalyptic number.

It is an amenable number.

2013330521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2013330521 is an equidigital number, since it uses as much as digits as its factorization.

2013330521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 2013330521 is about 44870.1517826717. The cubic root of 2013330521 is about 1262.7140876167.

Adding to 2013330521 its reverse (1250333102), we get a palindrome (3263663623).

The spelling of 2013330521 in words is "two billion, thirteen million, three hundred thirty thousand, five hundred twenty-one".