51719717 has 8 divisors (see below), whose sum is σ = 59560512. Its totient is φ = 43992000.

The previous prime is 51719711. The next prime is 51719741. The reversal of 51719717 is 71791715.

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 51719717 - 2¹² = 51715621 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 (51719711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27284 + ... + 29117.

It is an arithmetic number, because the mean of its divisors is an integer number (7445064).

Almost surely, 2^51719717 is an apocalyptic number.

It is an amenable number.

51719717 is a deficient number, since it is larger than the sum of its proper divisors (7840795).

51719717 is a wasteful number, since it uses less digits than its factorization.

51719717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56539.

The product of its digits is 15435, while the sum is 38.

The square root of 51719717 is about 7191.6421629556. The cubic root of 51719717 is about 372.5792921604.

The spelling of 51719717 in words is "fifty-one million, seven hundred nineteen thousand, seven hundred seventeen".