2873206521 has 6 divisors (see below), whose sum is σ = 4150187210. Its totient is φ = 1915471008.

The previous prime is 2873206513. The next prime is 2873206541. The reversal of 2873206521 is 1256023782.

2873206521 is a `hidden beast` number, since 287 + 320 + 6 + 52 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2380366521 + 492840000 = 48789^2 + 22200^2 .

It is not a de Polignac number, because 2873206521 - 2³ = 2873206513 is a prime.

It is a super-3 number, since 3×2873206521³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2873206541) 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 5 ways as a sum of consecutive naturals, for example, 159622576 + ... + 159622593.

Almost surely, 2^2873206521 is an apocalyptic number.

It is an amenable number.

2873206521 is a deficient number, since it is larger than the sum of its proper divisors (1276980689).

2873206521 is a wasteful number, since it uses less digits than its factorization.

2873206521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319245175 (or 319245172 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 2873206521 is about 53602.2995868647. The cubic root of 2873206521 is about 1421.6377521488.

The spelling of 2873206521 in words is "two billion, eight hundred seventy-three million, two hundred six thousand, five hundred twenty-one".