2053251521 has 6 divisors (see below), whose sum is σ = 2087466966. Its totient is φ = 2019588000.

The previous prime is 2053251503. The next prime is 2053251581. The reversal of 2053251521 is 1251523502.

It can be written as a sum of positive squares in 3 ways, for example, as 109411600 + 1943839921 = 10460^2 + 44089^2 .

It is not a de Polignac number, because 2053251521 - 2⁶ = 2053251457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2053251581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 272180 + ... + 279621.

It is an arithmetic number, because the mean of its divisors is an integer number (347911161).

Almost surely, 2^2053251521 is an apocalyptic number.

It is an amenable number.

2053251521 is a deficient number, since it is larger than the sum of its proper divisors (34215445).

2053251521 is an frugal number, since it uses more digits than its factorization.

2053251521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551923 (or 551862 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2053251521 is about 45312.8185064668. The cubic root of 2053251521 is about 1271.0053669329.

The spelling of 2053251521 in words is "two billion, fifty-three million, two hundred fifty-one thousand, five hundred twenty-one".