3817880521 has 45 divisors (see below), whose sum is σ = 4873126581. Its totient is φ = 2989598976.

The previous prime is 3817880513. The next prime is 3817880533. The reversal of 3817880521 is 1250887183.

The square root of 3817880521 is 61789.

It is a perfect power (a square), and thus also a powerful number.

3817880521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 697540921 + 3120339600 = 26411^2 + 55860^2 .

It is not a de Polignac number, because 3817880521 - 2³ = 3817880513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3817880021) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 39359545 + ... + 39359641.

Almost surely, 2^3817880521 is an apocalyptic number.

3817880521 is the 61789-th square number.

3817880521 is the 30895-th centered octagonal number.

It is an amenable number.

3817880521 is a deficient number, since it is larger than the sum of its proper divisors (1055246060).

3817880521 is an frugal number, since it uses more digits than its factorization.

3817880521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The cubic root of 3817880521 is about 1562.9344996304.

The spelling of 3817880521 in words is "three billion, eight hundred seventeen million, eight hundred eighty thousand, five hundred twenty-one".