2211661072 has 20 divisors (see below), whose sum is σ = 4300571596. Its totient is φ = 1101836160.

The previous prime is 2211661043. The next prime is 2211661091. The reversal of 2211661072 is 2701661122.

It can be written as a sum of positive squares in 2 ways, for example, as 358875136 + 1852785936 = 18944^2 + 43044^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2211661072.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245079 + ... + 253942.

Almost surely, 2^2211661072 is an apocalyptic number.

It is an amenable number.

2211661072 is a deficient number, since it is larger than the sum of its proper divisors (2088910524).

2211661072 is a wasteful number, since it uses less digits than its factorization.

2211661072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499306 (or 499300 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2211661072 is about 47028.3007560341. The cubic root of 2211661072 is about 1302.8853215318.

The spelling of 2211661072 in words is "two billion, two hundred eleven million, six hundred sixty-one thousand, seventy-two".