2217276643 has 4 divisors (see below), whose sum is σ = 2288801728. Its totient is φ = 2145751560.

The previous prime is 2217276641. The next prime is 2217276667. The reversal of 2217276643 is 3466727122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2217276643 - 2¹ = 2217276641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2217276596 and 2217276605.

It is not an unprimeable number, because it can be changed into a prime (2217276641) 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, 35762496 + ... + 35762557.

It is an arithmetic number, because the mean of its divisors is an integer number (572200432).

Almost surely, 2^2217276643 is an apocalyptic number.

2217276643 is a deficient number, since it is larger than the sum of its proper divisors (71525085).

2217276643 is an equidigital number, since it uses as much as digits as its factorization.

2217276643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71525084.

The product of its digits is 169344, while the sum is 40.

The square root of 2217276643 is about 47087.9670722787. The cubic root of 2217276643 is about 1303.9870969513.

The spelling of 2217276643 in words is "two billion, two hundred seventeen million, two hundred seventy-six thousand, six hundred forty-three".