55628317 has 2 divisors, whose sum is σ = 55628318. Its totient is φ = 55628316.

The previous prime is 55628303. The next prime is 55628347. The reversal of 55628317 is 71382655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55041561 + 586756 = 7419^2 + 766^2 .

It is a cyclic number.

It is not a de Polignac number, because 55628317 - 2⁷ = 55628189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55628347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27814158 + 27814159.

It is an arithmetic number, because the mean of its divisors is an integer number (27814159).

Almost surely, 2^55628317 is an apocalyptic number.

It is an amenable number.

55628317 is a deficient number, since it is larger than the sum of its proper divisors (1).

55628317 is an equidigital number, since it uses as much as digits as its factorization.

55628317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 55628317 is about 7458.4393139584. The cubic root of 55628317 is about 381.7379236363.

It can be divided in two parts, 55628 and 317, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 55628317 in words is "fifty-five million, six hundred twenty-eight thousand, three hundred seventeen".