55290317 has 2 divisors, whose sum is σ = 55290318. Its totient is φ = 55290316.

The previous prime is 55290259. The next prime is 55290349. The reversal of 55290317 is 71309255.

It is an a-pointer prime, because the next prime (55290349) can be obtained adding 55290317 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36228361 + 19061956 = 6019^2 + 4366^2 .

It is a cyclic number.

It is not a de Polignac number, because 55290317 - 2¹⁰ = 55289293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55298317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27645158 + 27645159.

It is an arithmetic number, because the mean of its divisors is an integer number (27645159).

Almost surely, 2^55290317 is an apocalyptic number.

It is an amenable number.

55290317 is a deficient number, since it is larger than the sum of its proper divisors (1).

55290317 is an equidigital number, since it uses as much as digits as its factorization.

55290317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 55290317 is about 7435.7458939907. The cubic root of 55290317 is about 380.9632005203.

The spelling of 55290317 in words is "fifty-five million, two hundred ninety thousand, three hundred seventeen".