2216640445 has 8 divisors (see below), whose sum is σ = 2661145344. Its totient is φ = 1772527824.

The previous prime is 2216640427. The next prime is 2216640463. The reversal of 2216640445 is 5440466122.

It is an interprime number because it is at equal distance from previous prime (2216640427) and next prime (2216640463).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2216640445 - 2¹⁹ = 2216116157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2216640445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85489 + ... + 108358.

It is an arithmetic number, because the mean of its divisors is an integer number (332643168).

Almost surely, 2^2216640445 is an apocalyptic number.

It is an amenable number.

2216640445 is a deficient number, since it is larger than the sum of its proper divisors (444504899).

2216640445 is a wasteful number, since it uses less digits than its factorization.

2216640445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196139.

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 2216640445 is about 47081.2111675135. The cubic root of 2216640445 is about 1303.8623683655.

The spelling of 2216640445 in words is "two billion, two hundred sixteen million, six hundred forty thousand, four hundred forty-five".