5521171561 has 16 divisors (see below), whose sum is σ = 5907242880. Its totient is φ = 5152014720.

The previous prime is 5521171559. The next prime is 5521171567. The reversal of 5521171561 is 1651711255.

It is a cyclic number.

It is not a de Polignac number, because 5521171561 - 2¹ = 5521171559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5521171567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58660 + ... + 120346.

It is an arithmetic number, because the mean of its divisors is an integer number (369202680).

Almost surely, 2^5521171561 is an apocalyptic number.

It is an amenable number.

5521171561 is a deficient number, since it is larger than the sum of its proper divisors (386071319).

5521171561 is a wasteful number, since it uses less digits than its factorization.

5521171561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61824.

The product of its digits is 10500, while the sum is 34.

The square root of 5521171561 is about 74304.5864062239. The cubic root of 5521171561 is about 1767.4362066060.

The spelling of 5521171561 in words is "five billion, five hundred twenty-one million, one hundred seventy-one thousand, five hundred sixty-one".