51317379 has 6 divisors (see below), whose sum is σ = 74125116. Its totient is φ = 34211580.

The previous prime is 51317359. The next prime is 51317401. The reversal of 51317379 is 97371315.

51317379 is a `hidden beast` number, since 513 + 1 + 73 + 79 = 666.

It is not a de Polignac number, because 51317379 - 2⁷ = 51317251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51317359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2850957 + ... + 2850974.

It is an arithmetic number, because the mean of its divisors is an integer number (12354186).

Almost surely, 2^51317379 is an apocalyptic number.

51317379 is a deficient number, since it is larger than the sum of its proper divisors (22807737).

51317379 is a wasteful number, since it uses less digits than its factorization.

51317379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5701937 (or 5701934 counting only the distinct ones).

The product of its digits is 19845, while the sum is 36.

The square root of 51317379 is about 7163.6149394004. The cubic root of 51317379 is about 371.6106531668.

The spelling of 51317379 in words is "fifty-one million, three hundred seventeen thousand, three hundred seventy-nine".