2520521643 has 16 divisors (see below), whose sum is σ = 3561096096. Its totient is φ = 1580298240.

The previous prime is 2520521603. The next prime is 2520521683. The reversal of 2520521643 is 3461250252.

It is an interprime number because it is at equal distance from previous prime (2520521603) and next prime (2520521683).

It is not a de Polignac number, because 2520521643 - 2⁹ = 2520521131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2520521643.

It is not an unprimeable number, because it can be changed into a prime (2520521603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51255 + ... + 87567.

It is an arithmetic number, because the mean of its divisors is an integer number (222568506).

Almost surely, 2^2520521643 is an apocalyptic number.

2520521643 is a deficient number, since it is larger than the sum of its proper divisors (1040574453).

2520521643 is a wasteful number, since it uses less digits than its factorization.

2520521643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37694.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 2520521643 is about 50204.7970118394. The cubic root of 2520521643 is about 1360.9123137237.

Adding to 2520521643 its reverse (3461250252), we get a palindrome (5981771895).

The spelling of 2520521643 in words is "two billion, five hundred twenty million, five hundred twenty-one thousand, six hundred forty-three".