5121887557 has 4 divisors (see below), whose sum is σ = 5230863936. Its totient is φ = 5012911180.

The previous prime is 5121887473. The next prime is 5121887579. The reversal of 5121887557 is 7557881215.

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 5121887557 - 2¹⁵ = 5121854789 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 5121887557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5121887597) 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, 54488119 + ... + 54488212.

It is an arithmetic number, because the mean of its divisors is an integer number (1307715984).

Almost surely, 2^5121887557 is an apocalyptic number.

It is an amenable number.

5121887557 is a deficient number, since it is larger than the sum of its proper divisors (108976379).

5121887557 is a wasteful number, since it uses less digits than its factorization.

5121887557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108976378.

The product of its digits is 784000, while the sum is 49.

The square root of 5121887557 is about 71567.3637700873. The cubic root of 5121887557 is about 1723.7595290382.

The spelling of 5121887557 in words is "five billion, one hundred twenty-one million, eight hundred eighty-seven thousand, five hundred fifty-seven".