51771317 has 8 divisors (see below), whose sum is σ = 55812120. Its totient is φ = 47738880.

The previous prime is 51771277. The next prime is 51771319. The reversal of 51771317 is 71317715.

It can be written as a sum of positive squares in 4 ways, for example, as 948676 + 50822641 = 974^2 + 7129^2 .

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 51771317 - 2⁶ = 51771253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51771319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17909 + ... + 20597.

It is an arithmetic number, because the mean of its divisors is an integer number (6976515).

Almost surely, 2^51771317 is an apocalyptic number.

It is an amenable number.

51771317 is a deficient number, since it is larger than the sum of its proper divisors (4040803).

51771317 is a wasteful number, since it uses less digits than its factorization.

51771317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183.

The product of its digits is 5145, while the sum is 32.

The square root of 51771317 is about 7195.2287663423. The cubic root of 51771317 is about 372.7031566013.

The spelling of 51771317 in words is "fifty-one million, seven hundred seventy-one thousand, three hundred seventeen".