51000086 has 4 divisors (see below), whose sum is σ = 76500132. Its totient is φ = 25500042.

The previous prime is 51000083. The next prime is 51000113. The reversal of 51000086 is 68000015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68000015 = 5 ⋅13600003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12750020 + ... + 12750023.

It is an arithmetic number, because the mean of its divisors is an integer number (19125033).

Almost surely, 2^51000086 is an apocalyptic number.

51000086 is a deficient number, since it is larger than the sum of its proper divisors (25500046).

51000086 is a wasteful number, since it uses less digits than its factorization.

51000086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25500045.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 51000086 is about 7141.4344497447. The cubic root of 51000086 is about 370.8431853742.

The spelling of 51000086 in words is "fifty-one million, eighty-six", and thus it is an aban number and an uban number.