51819789 has 8 divisors (see below), whose sum is σ = 78963520. Its totient is φ = 29611296.

The previous prime is 51819749. The next prime is 51819797. The reversal of 51819789 is 98791815.

51819789 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 not a de Polignac number, because 51819789 - 2⁷ = 51819661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51819739) 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, 1233784 + ... + 1233825.

It is an arithmetic number, because the mean of its divisors is an integer number (9870440).

Almost surely, 2^51819789 is an apocalyptic number.

It is an amenable number.

51819789 is a deficient number, since it is larger than the sum of its proper divisors (27143731).

51819789 is a wasteful number, since it uses less digits than its factorization.

51819789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467619.

The product of its digits is 181440, while the sum is 48.

The square root of 51819789 is about 7198.5963215060. The cubic root of 51819789 is about 372.8194374125.

It can be divided in two parts, 51 and 819789, that added together give a triangular number (819840 = T₁₂₈₀).

The spelling of 51819789 in words is "fifty-one million, eight hundred nineteen thousand, seven hundred eighty-nine".