1045155217 has 2 divisors, whose sum is σ = 1045155218. Its totient is φ = 1045155216.

The previous prime is 1045155187. The next prime is 1045155229. The reversal of 1045155217 is 7125515401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 866772481 + 178382736 = 29441^2 + 13356^2 .

It is an emirp because it is prime and its reverse (7125515401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1045155217 - 2²³ = 1036766609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1045155017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522577608 + 522577609.

It is an arithmetic number, because the mean of its divisors is an integer number (522577609).

Almost surely, 2^1045155217 is an apocalyptic number.

It is an amenable number.

1045155217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045155217 is an equidigital number, since it uses as much as digits as its factorization.

1045155217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 1045155217 is about 32328.8604346024. The cubic root of 1045155217 is about 1014.8307019436.

The spelling of 1045155217 in words is "one billion, forty-five million, one hundred fifty-five thousand, two hundred seventeen".