51000551 has 8 divisors (see below), whose sum is σ = 58609824. Its totient is φ = 43472160.

The previous prime is 51000539. The next prime is 51000557. The reversal of 51000551 is 15500015.

51000551 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 a de Polignac number, because none of the positive numbers 2^k-51000551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000557) 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, 18860 + ... + 21393.

It is an arithmetic number, because the mean of its divisors is an integer number (7326228).

Almost surely, 2^51000551 is an apocalyptic number.

51000551 is a deficient number, since it is larger than the sum of its proper divisors (7609273).

51000551 is a wasteful number, since it uses less digits than its factorization.

51000551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40441.

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 51000551 is about 7141.4670061550. The cubic root of 51000551 is about 370.8443124413.

Adding to 51000551 its reverse (15500015), we get a palindrome (66500566).

The spelling of 51000551 in words is "fifty-one million, five hundred fifty-one", and thus it is an aban number.