5205513511 has 4 divisors (see below), whose sum is σ = 5678742024. Its totient is φ = 4732285000.

The previous prime is 5205513503. The next prime is 5205513539. The reversal of 5205513511 is 1153155025.

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 5205513511 - 2³ = 5205513503 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 5205513511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205513541) 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, 236614240 + ... + 236614261.

It is an arithmetic number, because the mean of its divisors is an integer number (1419685506).

Almost surely, 2^5205513511 is an apocalyptic number.

5205513511 is a deficient number, since it is larger than the sum of its proper divisors (473228513).

5205513511 is a wasteful number, since it uses less digits than its factorization.

5205513511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473228512.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 5205513511 is about 72149.2447015213. The cubic root of 5205513511 is about 1733.0903045075.

Adding to 5205513511 its reverse (1153155025), we get a palindrome (6358668536).

The spelling of 5205513511 in words is "five billion, two hundred five million, five hundred thirteen thousand, five hundred eleven".