2520621871 has 8 divisors (see below), whose sum is σ = 2679048320. Its totient is φ = 2364771672.

The previous prime is 2520621869. The next prime is 2520621919. The reversal of 2520621871 is 1781260252.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2520621871 - 2¹ = 2520621869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520621371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642045 + ... + 645958.

It is an arithmetic number, because the mean of its divisors is an integer number (334881040).

Almost surely, 2^2520621871 is an apocalyptic number.

2520621871 is a deficient number, since it is larger than the sum of its proper divisors (158426449).

2520621871 is a wasteful number, since it uses less digits than its factorization.

2520621871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288125.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 2520621871 is about 50205.7951933838. The cubic root of 2520621871 is about 1360.9303522796.

The spelling of 2520621871 in words is "two billion, five hundred twenty million, six hundred twenty-one thousand, eight hundred seventy-one".