51716397 has 16 divisors (see below), whose sum is σ = 76187520. Its totient is φ = 31037952.

The previous prime is 51716377. The next prime is 51716407. The reversal of 51716397 is 79361715.

It is not a de Polignac number, because 51716397 - 2¹⁴ = 51700013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51716317) 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 15 ways as a sum of consecutive naturals, for example, 20872 + ... + 23217.

It is an arithmetic number, because the mean of its divisors is an integer number (4761720).

Almost surely, 2^51716397 is an apocalyptic number.

It is an amenable number.

51716397 is a deficient number, since it is larger than the sum of its proper divisors (24471123).

51716397 is a wasteful number, since it uses less digits than its factorization.

51716397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44132.

The product of its digits is 39690, while the sum is 39.

The square root of 51716397 is about 7191.4113357532. The cubic root of 51716397 is about 372.5713197675.

The spelling of 51716397 in words is "fifty-one million, seven hundred sixteen thousand, three hundred ninety-seven".