50000005551 has 4 divisors (see below), whose sum is σ = 66666674072. Its totient is φ = 33333337032.

The previous prime is 50000005547. The next prime is 50000005613. The reversal of 50000005551 is 15550000005.

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

It is not a de Polignac number, because 50000005551 - 2² = 50000005547 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 (50000005051) 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, 8333334256 + ... + 8333334261.

It is an arithmetic number, because the mean of its divisors is an integer number (16666668518).

Almost surely, 2^50000005551 is an apocalyptic number.

50000005551 is a deficient number, since it is larger than the sum of its proper divisors (16666668521).

50000005551 is a wasteful number, since it uses less digits than its factorization.

50000005551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666668520.

The product of its (nonzero) digits is 625, while the sum is 21.

Adding to 50000005551 its reverse (15550000005), we get a palindrome (65550005556).

The spelling of 50000005551 in words is "fifty billion, five thousand, five hundred fifty-one".