51000655 has 8 divisors (see below), whose sum is σ = 64422000. Its totient is φ = 38653056.

The previous prime is 51000643. The next prime is 51000659. The reversal of 51000655 is 55600015.

51000655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51000655 - 2¹³ = 50992463 is a prime.

It is a super-3 number, since 3×51000655³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268330 + ... + 268519.

It is an arithmetic number, because the mean of its divisors is an integer number (8052750).

Almost surely, 2^51000655 is an apocalyptic number.

51000655 is a deficient number, since it is larger than the sum of its proper divisors (13421345).

51000655 is a wasteful number, since it uses less digits than its factorization.

51000655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536873.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 51000655 is about 7141.4742875684. The cubic root of 51000655 is about 370.8445645156.

Subtracting from 51000655 its product of nonzero digits (750), we obtain a palindrome (50999905).

The spelling of 51000655 in words is "fifty-one million, six hundred fifty-five", and thus it is an aban number.