51859769 has 8 divisors (see below), whose sum is σ = 56206920. Its totient is φ = 47563776.

The previous prime is 51859757. The next prime is 51859771. The reversal of 51859769 is 96795815.

It is a happy number.

51859769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1236544 + 50623225 = 1112^2 + 7115^2 .

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

It is not a de Polignac number, because 51859769 - 2¹⁶ = 51794233 is a prime.

It is a super-2 number, since 2×51859769² = 5378871281466722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51858769) 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, 10664 + ... + 14745.

It is an arithmetic number, because the mean of its divisors is an integer number (7025865).

Almost surely, 2^51859769 is an apocalyptic number.

It is an amenable number.

51859769 is a deficient number, since it is larger than the sum of its proper divisors (4347151).

51859769 is a wasteful number, since it uses less digits than its factorization.

51859769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25579.

The product of its digits is 680400, while the sum is 50.

The square root of 51859769 is about 7201.3727163646. The cubic root of 51859769 is about 372.9152919743.

The spelling of 51859769 in words is "fifty-one million, eight hundred fifty-nine thousand, seven hundred sixty-nine".