2217990609 has 24 divisors (see below), whose sum is σ = 3261814920. Its totient is φ = 1452045312.

The previous prime is 2217990601. The next prime is 2217990617. The reversal of 2217990609 is 9060997122.

2217990609 is a `hidden beast` number, since 22 + 17 + 9 + 9 + 0 + 609 = 666.

It is an interprime number because it is at equal distance from previous prime (2217990601) and next prime (2217990617).

It can be written as a sum of positive squares in 4 ways, for example, as 10870209 + 2207120400 = 3297^2 + 46980^2 .

It is not a de Polignac number, because 2217990609 - 2³ = 2217990601 is a prime.

It is a super-2 number, since 2×2217990609² = 9838964683224381762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2217990601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145837 + ... + 160325.

It is an arithmetic number, because the mean of its divisors is an integer number (135908955).

Almost surely, 2^2217990609 is an apocalyptic number.

It is an amenable number.

2217990609 is a deficient number, since it is larger than the sum of its proper divisors (1043824311).

2217990609 is a wasteful number, since it uses less digits than its factorization.

2217990609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14801 (or 14798 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 2217990609 is about 47095.5476558029. The cubic root of 2217990609 is about 1304.1270437857.

The spelling of 2217990609 in words is "two billion, two hundred seventeen million, nine hundred ninety thousand, six hundred nine".