5185551887 has 4 divisors (see below), whose sum is σ = 5325701976. Its totient is φ = 5045401800.

The previous prime is 5185551881. The next prime is 5185551893. The reversal of 5185551887 is 7881555815.

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

It is an interprime number because it is at equal distance from previous prime (5185551881) and next prime (5185551893).

It is a cyclic number.

It is not a de Polignac number, because 5185551887 - 2²² = 5181357583 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 (5185551881) 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, 70074989 + ... + 70075062.

It is an arithmetic number, because the mean of its divisors is an integer number (1331425494).

Almost surely, 2^5185551887 is an apocalyptic number.

5185551887 is a deficient number, since it is larger than the sum of its proper divisors (140150089).

5185551887 is a wasteful number, since it uses less digits than its factorization.

5185551887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140150088.

The product of its digits is 2240000, while the sum is 53.

The square root of 5185551887 is about 72010.7761866236. The cubic root of 5185551887 is about 1730.8721684007.

The spelling of 5185551887 in words is "five billion, one hundred eighty-five million, five hundred fifty-one thousand, eight hundred eighty-seven".