2209161650 has 24 divisors (see below), whose sum is σ = 4111588404. Its totient is φ = 883116800.

The previous prime is 2209161629. The next prime is 2209161659. The reversal of 2209161650 is 561619022.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1481403121 + 727758529 = 38489^2 + 26977^2 .

It is not an unprimeable number, because it can be changed into a prime (2209161659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73214 + ... + 98886.

Almost surely, 2^2209161650 is an apocalyptic number.

2209161650 is a deficient number, since it is larger than the sum of its proper divisors (1902426754).

2209161650 is a wasteful number, since it uses less digits than its factorization.

2209161650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27406 (or 27401 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 2209161650 is about 47001.7196493916. The cubic root of 2209161650 is about 1302.3943349503.

The spelling of 2209161650 in words is "two billion, two hundred nine million, one hundred sixty-one thousand, six hundred fifty".