5205220171887 has 4 divisors (see below), whose sum is σ = 6940293562520. Its totient is φ = 3470146781256.

The previous prime is 5205220171859. The next prime is 5205220171889. The reversal of 5205220171887 is 7881710225025.

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

It is not a de Polignac number, because 5205220171887 - 2⁷ = 5205220171759 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 (5205220171889) 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, 867536695312 + ... + 867536695317.

It is an arithmetic number, because the mean of its divisors is an integer number (1735073390630).

Almost surely, 2^{5205220171887} is an apocalyptic number.

5205220171887 is a deficient number, since it is larger than the sum of its proper divisors (1735073390633).

5205220171887 is a wasteful number, since it uses less digits than its factorization.

5205220171887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735073390632.

The product of its (nonzero) digits is 627200, while the sum is 48.

The spelling of 5205220171887 in words is "five trillion, two hundred five billion, two hundred twenty million, one hundred seventy-one thousand, eight hundred eighty-seven".