51535789 has 8 divisors (see below), whose sum is σ = 55462968. Its totient is φ = 47708160.

The previous prime is 51535787. The next prime is 51535817. The reversal of 51535789 is 98753515.

It can be written as a sum of positive squares in 4 ways, for example, as 656100 + 50879689 = 810^2 + 7133^2 .

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 51535789 - 2¹ = 51535787 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 (51535787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23812 + ... + 25885.

It is an arithmetic number, because the mean of its divisors is an integer number (6932871).

Almost surely, 2^51535789 is an apocalyptic number.

It is an amenable number.

51535789 is a deficient number, since it is larger than the sum of its proper divisors (3927179).

51535789 is a wasteful number, since it uses less digits than its factorization.

51535789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49775.

The product of its digits is 189000, while the sum is 43.

The square root of 51535789 is about 7178.8431519291. The cubic root of 51535789 is about 372.1371064542.

The spelling of 51535789 in words is "fifty-one million, five hundred thirty-five thousand, seven hundred eighty-nine".