55315717 has 2 divisors, whose sum is σ = 55315718. Its totient is φ = 55315716.

The previous prime is 55315709. The next prime is 55315723. The reversal of 55315717 is 71751355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51926436 + 3389281 = 7206^2 + 1841^2 .

It is a cyclic number.

It is not a de Polignac number, because 55315717 - 2³ = 55315709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55315747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27657858 + 27657859.

It is an arithmetic number, because the mean of its divisors is an integer number (27657859).

Almost surely, 2^55315717 is an apocalyptic number.

It is an amenable number.

55315717 is a deficient number, since it is larger than the sum of its proper divisors (1).

55315717 is an equidigital number, since it uses as much as digits as its factorization.

55315717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18375, while the sum is 34.

The square root of 55315717 is about 7437.4536637212. The cubic root of 55315717 is about 381.0215289006.

The spelling of 55315717 in words is "fifty-five million, three hundred fifteen thousand, seven hundred seventeen".