51340717 has 4 divisors (see below), whose sum is σ = 54042880. Its totient is φ = 48638556.

The previous prime is 51340699. The next prime is 51340721. The reversal of 51340717 is 71704315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71704315 = 5 ⋅14340863.

It is not a de Polignac number, because 51340717 - 2¹¹ = 51338669 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 (51340777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1351053 + ... + 1351090.

It is an arithmetic number, because the mean of its divisors is an integer number (13510720).

Almost surely, 2^51340717 is an apocalyptic number.

It is an amenable number.

51340717 is a deficient number, since it is larger than the sum of its proper divisors (2702163).

51340717 is a wasteful number, since it uses less digits than its factorization.

51340717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702162.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 51340717 is about 7165.2436804340. The cubic root of 51340717 is about 371.6669780430. Note that the first 3 decimals are identical.

The spelling of 51340717 in words is "fifty-one million, three hundred forty thousand, seven hundred seventeen".