2052507921 has 4 divisors (see below), whose sum is σ = 2736677232. Its totient is φ = 1368338612.

The previous prime is 2052507917. The next prime is 2052507967. The reversal of 2052507921 is 1297052502.

It is a happy number.

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 2052507921 - 2² = 2052507917 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2052507901) 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, 342084651 + ... + 342084656.

It is an arithmetic number, because the mean of its divisors is an integer number (684169308).

Almost surely, 2^2052507921 is an apocalyptic number.

It is an amenable number.

2052507921 is a deficient number, since it is larger than the sum of its proper divisors (684169311).

2052507921 is an equidigital number, since it uses as much as digits as its factorization.

2052507921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684169310.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 2052507921 is about 45304.6125797363. The cubic root of 2052507921 is about 1270.8519137882.

The spelling of 2052507921 in words is "two billion, fifty-two million, five hundred seven thousand, nine hundred twenty-one".