2513521 has 4 divisors (see below), whose sum is σ = 2581492. Its totient is φ = 2445552.

The previous prime is 2513519. The next prime is 2513527. The reversal of 2513521 is 1253152.

2513521 is digitally balanced in base 2, 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 2283121 + 230400 = 1511^2 + 480^2 .

It is not a de Polignac number, because 2513521 - 2¹ = 2513519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2513527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33930 + ... + 34003.

It is an arithmetic number, because the mean of its divisors is an integer number (645373).

2^2513521 is an apocalyptic number.

It is an amenable number.

2513521 is a deficient number, since it is larger than the sum of its proper divisors (67971).

2513521 is an equidigital number, since it uses as much as digits as its factorization.

2513521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67970.

The product of its digits is 300, while the sum is 19.

The square root of 2513521 is about 1585.4087800943. The cubic root of 2513521 is about 135.9651186495.

Adding to 2513521 its reverse (1253152), we get a palindrome (3766673).

The spelling of 2513521 in words is "two million, five hundred thirteen thousand, five hundred twenty-one".