51000455551 has 8 divisors (see below), whose sum is σ = 51048925200. Its totient is φ = 50952012672.

The previous prime is 51000455503. The next prime is 51000455579. The reversal of 51000455551 is 15555400015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51000455551 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 (51000455851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6160551 + ... + 6168823.

It is an arithmetic number, because the mean of its divisors is an integer number (6381115650).

Almost surely, 2^51000455551 is an apocalyptic number.

51000455551 is a deficient number, since it is larger than the sum of its proper divisors (48469649).

51000455551 is a wasteful number, since it uses less digits than its factorization.

51000455551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13385.

The product of its (nonzero) digits is 12500, while the sum is 31.

Adding to 51000455551 its reverse (15555400015), we get a palindrome (66555855566).

The spelling of 51000455551 in words is "fifty-one billion, four hundred fifty-five thousand, five hundred fifty-one".