51461317 has 2 divisors, whose sum is σ = 51461318. Its totient is φ = 51461316.

The previous prime is 51461309. The next prime is 51461351. The reversal of 51461317 is 71316415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35212356 + 16248961 = 5934^2 + 4031^2 .

It is a cyclic number.

It is not a de Polignac number, because 51461317 - 2³ = 51461309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51461387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25730658 + 25730659.

It is an arithmetic number, because the mean of its divisors is an integer number (25730659).

Almost surely, 2^51461317 is an apocalyptic number.

It is an amenable number.

51461317 is a deficient number, since it is larger than the sum of its proper divisors (1).

51461317 is an equidigital number, since it uses as much as digits as its factorization.

51461317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 51461317 is about 7173.6543685907. The cubic root of 51461317 is about 371.9577672987.

The spelling of 51461317 in words is "fifty-one million, four hundred sixty-one thousand, three hundred seventeen".