55530380317 has 2 divisors, whose sum is σ = 55530380318. Its totient is φ = 55530380316.

The previous prime is 55530380287. The next prime is 55530380359. The reversal of 55530380317 is 71308303555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48953332516 + 6577047801 = 221254^2 + 81099^2 .

It is a cyclic number.

It is not a de Polignac number, because 55530380317 - 2²³ = 55521991709 is a prime.

It is a super-2 number, since 2×55530380317² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55530380317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55530380117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27765190158 + 27765190159.

It is an arithmetic number, because the mean of its divisors is an integer number (27765190159).

Almost surely, 2^55530380317 is an apocalyptic number.

It is an amenable number.

55530380317 is a deficient number, since it is larger than the sum of its proper divisors (1).

55530380317 is an equidigital number, since it uses as much as digits as its factorization.

55530380317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 40.

The spelling of 55530380317 in words is "fifty-five billion, five hundred thirty million, three hundred eighty thousand, three hundred seventeen".