5516631521 has 4 divisors (see below), whose sum is σ = 5558743344. Its totient is φ = 5474519700.

The previous prime is 5516631499. The next prime is 5516631559. The reversal of 5516631521 is 1251366155.

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 5516631521 - 2⁶ = 5516631457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5516331521) 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, 21055715 + ... + 21055976.

It is an arithmetic number, because the mean of its divisors is an integer number (1389685836).

Almost surely, 2^5516631521 is an apocalyptic number.

It is an amenable number.

5516631521 is a deficient number, since it is larger than the sum of its proper divisors (42111823).

5516631521 is a wasteful number, since it uses less digits than its factorization.

5516631521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42111822.

The product of its digits is 27000, while the sum is 35.

The square root of 5516631521 is about 74274.0299229818. The cubic root of 5516631521 is about 1766.9516215607.

Adding to 5516631521 its reverse (1251366155), we get a palindrome (6767997676).

The spelling of 5516631521 in words is "five billion, five hundred sixteen million, six hundred thirty-one thousand, five hundred twenty-one".