2013030521 has 4 divisors (see below), whose sum is σ = 2038512000. Its totient is φ = 1987549044.

The previous prime is 2013030491. The next prime is 2013030527. The reversal of 2013030521 is 1250303102.

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 2013030521 - 2¹⁴ = 2013014137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2013030521.

It is not an unprimeable number, because it can be changed into a prime (2013030527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12740621 + ... + 12740778.

It is an arithmetic number, because the mean of its divisors is an integer number (509628000).

Almost surely, 2^2013030521 is an apocalyptic number.

It is an amenable number.

2013030521 is a deficient number, since it is larger than the sum of its proper divisors (25481479).

2013030521 is an equidigital number, since it uses as much as digits as its factorization.

2013030521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25481478.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 2013030521 is about 44866.8086785766. The cubic root of 2013030521 is about 1262.6513668266.

Adding to 2013030521 its reverse (1250303102), we get a palindrome (3263333623).

The spelling of 2013030521 in words is "two billion, thirteen million, thirty thousand, five hundred twenty-one".