2219664071 has 4 divisors (see below), whose sum is σ = 2219783544. Its totient is φ = 2219544600.

The previous prime is 2219664047. The next prime is 2219664079. The reversal of 2219664071 is 1704669122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2219664071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2219664079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25220 + ... + 71241.

It is an arithmetic number, because the mean of its divisors is an integer number (554945886).

Almost surely, 2^2219664071 is an apocalyptic number.

2219664071 is a deficient number, since it is larger than the sum of its proper divisors (119473).

2219664071 is an equidigital number, since it uses as much as digits as its factorization.

2219664071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119472.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 2219664071 is about 47113.3109747129. The cubic root of 2219664071 is about 1304.4549469488.

The spelling of 2219664071 in words is "two billion, two hundred nineteen million, six hundred sixty-four thousand, seventy-one".