5205218551 has 4 divisors (see below), whose sum is σ = 5605619992. Its totient is φ = 4804817112.

The previous prime is 5205218533. The next prime is 5205218561. The reversal of 5205218551 is 1558125025.

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

It is a cyclic number.

It is not a de Polignac number, because 5205218551 - 2⁵ = 5205218519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205218521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200200701 + ... + 200200726.

It is an arithmetic number, because the mean of its divisors is an integer number (1401404998).

Almost surely, 2^5205218551 is an apocalyptic number.

5205218551 is a deficient number, since it is larger than the sum of its proper divisors (400401441).

5205218551 is a wasteful number, since it uses less digits than its factorization.

5205218551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400401440.

The product of its (nonzero) digits is 20000, while the sum is 34.

The square root of 5205218551 is about 72147.2005763217. The cubic root of 5205218551 is about 1733.0575698586.

The spelling of 5205218551 in words is "five billion, two hundred five million, two hundred eighteen thousand, five hundred fifty-one".