2211565144 has 8 divisors (see below), whose sum is σ = 4146684660. Its totient is φ = 1105782568.

The previous prime is 2211565099. The next prime is 2211565151. The reversal of 2211565144 is 4415651122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138222814 + ... + 138222829.

Almost surely, 2^2211565144 is an apocalyptic number.

It is an amenable number.

2211565144 is a deficient number, since it is larger than the sum of its proper divisors (1935119516).

2211565144 is a wasteful number, since it uses less digits than its factorization.

2211565144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276445649 (or 276445645 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 2211565144 is about 47027.2808484607. The cubic root of 2211565144 is about 1302.8664842588.

The spelling of 2211565144 in words is "two billion, two hundred eleven million, five hundred sixty-five thousand, one hundred forty-four".