51161773 has 4 divisors (see below), whose sum is σ = 55097308. Its totient is φ = 47226240.

The previous prime is 51161753. The next prime is 51161779. The reversal of 51161773 is 37716115.

51161773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27910089 + 23251684 = 5283^2 + 4822^2 .

It is a cyclic number.

It is not a de Polignac number, because 51161773 - 2⁵ = 51161741 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 (51161779) 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 3 ways as a sum of consecutive naturals, for example, 1967748 + ... + 1967773.

It is an arithmetic number, because the mean of its divisors is an integer number (13774327).

Almost surely, 2^51161773 is an apocalyptic number.

It is an amenable number.

51161773 is a deficient number, since it is larger than the sum of its proper divisors (3935535).

51161773 is a wasteful number, since it uses less digits than its factorization.

51161773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935534.

The product of its digits is 4410, while the sum is 31.

The square root of 51161773 is about 7152.7458363904. The cubic root of 51161773 is about 371.2346701300.

Adding to 51161773 its reverse (37716115), we get a palindrome (88877888).

It can be divided in two parts, 5116 and 1773, that added together give a square (6889 = 83²).

The spelling of 51161773 in words is "fifty-one million, one hundred sixty-one thousand, seven hundred seventy-three".