1052217209 has 2 divisors, whose sum is σ = 1052217210. Its totient is φ = 1052217208.

The previous prime is 1052217191. The next prime is 1052217217. The reversal of 1052217209 is 9027122501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 706071184 + 346146025 = 26572^2 + 18605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1052217209 is a prime.

It is a super-2 number, since 2×1052217209² = 2214322109831499362, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1052217239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526108604 + 526108605.

It is an arithmetic number, because the mean of its divisors is an integer number (526108605).

Almost surely, 2^1052217209 is an apocalyptic number.

It is an amenable number.

1052217209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1052217209 is an equidigital number, since it uses as much as digits as its factorization.

1052217209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1052217209 is about 32437.8977278121. The cubic root of 1052217209 is about 1017.1112707131. Note that the first 3 decimals are identical.

The spelling of 1052217209 in words is "one billion, fifty-two million, two hundred seventeen thousand, two hundred nine".