500050005551 has 4 divisors (see below), whose sum is σ = 500065408632. Its totient is φ = 500034602472.

The previous prime is 500050005541. The next prime is 500050005563. The reversal of 500050005551 is 155500050005.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-500050005551 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 500050005551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500050005541) 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, 7652741 + ... + 7717806.

It is an arithmetic number, because the mean of its divisors is an integer number (125016352158).

Almost surely, 2^500050005551 is an apocalyptic number.

500050005551 is a deficient number, since it is larger than the sum of its proper divisors (15403081).

500050005551 is a wasteful number, since it uses less digits than its factorization.

500050005551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15403080.

The product of its (nonzero) digits is 3125, while the sum is 26.

Adding to 500050005551 its reverse (155500050005), we get a palindrome (655550055556).

The spelling of 500050005551 in words is "five hundred billion, fifty million, five thousand, five hundred fifty-one".