51406317 has 24 divisors (see below), whose sum is σ = 78933816. Its totient is φ = 32126976.

The previous prime is 51406309. The next prime is 51406319. The reversal of 51406317 is 71360415.

51406317 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 17464041 + 33942276 = 4179^2 + 5826^2 .

It is not a de Polignac number, because 51406317 - 2³ = 51406309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51406319) 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 23 ways as a sum of consecutive naturals, for example, 51063 + ... + 52059.

It is an arithmetic number, because the mean of its divisors is an integer number (3288909).

Almost surely, 2^51406317 is an apocalyptic number.

It is an amenable number.

51406317 is a deficient number, since it is larger than the sum of its proper divisors (27527499).

51406317 is a wasteful number, since it uses less digits than its factorization.

51406317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1354 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 51406317 is about 7169.8198722144. The cubic root of 51406317 is about 371.8252083795.

The spelling of 51406317 in words is "fifty-one million, four hundred six thousand, three hundred seventeen".