51000016 has 20 divisors (see below), whose sum is σ = 103109472. Its totient is φ = 24391136.

The previous prime is 50999999. The next prime is 51000041. The reversal of 51000016 is 61000015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68926 + ... + 69661.

Almost surely, 2^51000016 is an apocalyptic number.

It is an amenable number.

51000016 is an abundant number, since it is smaller than the sum of its proper divisors (52109456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51000016 is a wasteful number, since it uses less digits than its factorization.

51000016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138618 (or 138612 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 51000016 is about 7141.4295487668. The cubic root of 51000016 is about 370.8430157076.

Subtracting 51000016 from its reverse (61000015), we obtain a palindrome (9999999).

The spelling of 51000016 in words is "fifty-one million, sixteen", and thus it is an aban number and an uban number.