1024220209 has 2 divisors, whose sum is σ = 1024220210. Its totient is φ = 1024220208.

The previous prime is 1024220201. The next prime is 1024220261. The reversal of 1024220209 is 9020224201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 578883600 + 445336609 = 24060^2 + 21103^2 .

It is a cyclic number.

It is not a de Polignac number, because 1024220209 - 2³ = 1024220201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1024220209.

It is not a weakly prime, because it can be changed into another prime (1024220201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512110104 + 512110105.

It is an arithmetic number, because the mean of its divisors is an integer number (512110105).

Almost surely, 2^1024220209 is an apocalyptic number.

It is an amenable number.

1024220209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024220209 is an equidigital number, since it uses as much as digits as its factorization.

1024220209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1024220209 is about 32003.4405806626. The cubic root of 1024220209 is about 1008.0090862880.

The spelling of 1024220209 in words is "one billion, twenty-four million, two hundred twenty thousand, two hundred nine".