145552056217 has 2 divisors, whose sum is σ = 145552056218. Its totient is φ = 145552056216.

The previous prime is 145552056179. The next prime is 145552056359. The reversal of 145552056217 is 712650255541.

145552056217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77921372736 + 67630683481 = 279144^2 + 260059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145552056217 is a prime.

It is not a weakly prime, because it can be changed into another prime (145552051217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72776028108 + 72776028109.

It is an arithmetic number, because the mean of its divisors is an integer number (72776028109).

Almost surely, 2^145552056217 is an apocalyptic number.

It is an amenable number.

145552056217 is a deficient number, since it is larger than the sum of its proper divisors (1).

145552056217 is an equidigital number, since it uses as much as digits as its factorization.

145552056217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420000, while the sum is 43.

The spelling of 145552056217 in words is "one hundred forty-five billion, five hundred fifty-two million, fifty-six thousand, two hundred seventeen".