2520521641 has 4 divisors (see below), whose sum is σ = 2749659984. Its totient is φ = 2291383300.

The previous prime is 2520521603. The next prime is 2520521683. The reversal of 2520521641 is 1461250252.

2520521641 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, 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 2520521641 - 2¹¹ = 2520519593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520524641) 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, 114569155 + ... + 114569176.

It is an arithmetic number, because the mean of its divisors is an integer number (687414996).

Almost surely, 2^2520521641 is an apocalyptic number.

It is an amenable number.

2520521641 is a deficient number, since it is larger than the sum of its proper divisors (229138343).

2520521641 is a wasteful number, since it uses less digits than its factorization.

2520521641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229138342.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2520521641 is about 50204.7969919210. The cubic root of 2520521641 is about 1360.9123133637.

Adding to 2520521641 its reverse (1461250252), we get a palindrome (3981771893).

The spelling of 2520521641 in words is "two billion, five hundred twenty million, five hundred twenty-one thousand, six hundred forty-one".