51030500855 has 4 divisors (see below), whose sum is σ = 61236601032. Its totient is φ = 40824400680.

The previous prime is 51030500803. The next prime is 51030500869. The reversal of 51030500855 is 55800503015.

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

It is not a de Polignac number, because 51030500855 - 2¹⁶ = 51030435319 is a prime.

It is a super-2 number, since 2×51030500855² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5103050081 + ... + 5103050090.

It is an arithmetic number, because the mean of its divisors is an integer number (15309150258).

Almost surely, 2^51030500855 is an apocalyptic number.

51030500855 is a deficient number, since it is larger than the sum of its proper divisors (10206100177).

51030500855 is a wasteful number, since it uses less digits than its factorization.

51030500855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10206100176.

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 51030500855 in words is "fifty-one billion, thirty million, five hundred thousand, eight hundred fifty-five".