4056500521 has 4 divisors (see below), whose sum is σ = 4098320212. Its totient is φ = 4014680832.

The previous prime is 4056500519. The next prime is 4056500527. The reversal of 4056500521 is 1250056504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 746109225 + 3310391296 = 27315^2 + 57536^2 .

It is a cyclic number.

It is not a de Polignac number, because 4056500521 - 2¹ = 4056500519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4056500521.

It is not an unprimeable number, because it can be changed into a prime (4056500527) 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, 20909700 + ... + 20909893.

It is an arithmetic number, because the mean of its divisors is an integer number (1024580053).

Almost surely, 2^4056500521 is an apocalyptic number.

It is an amenable number.

4056500521 is a deficient number, since it is larger than the sum of its proper divisors (41819691).

4056500521 is an equidigital number, since it uses as much as digits as its factorization.

4056500521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41819690.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 4056500521 is about 63690.6627458060. The cubic root of 4056500521 is about 1594.8402169580.

The spelling of 4056500521 in words is "four billion, fifty-six million, five hundred thousand, five hundred twenty-one".