2217921023 has 4 divisors (see below), whose sum is σ = 2265110880. Its totient is φ = 2170731168.

The previous prime is 2217921019. The next prime is 2217921059. The reversal of 2217921023 is 3201297122.

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 2217921023 - 2² = 2217921019 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 (2217921323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23594858 + ... + 23594951.

It is an arithmetic number, because the mean of its divisors is an integer number (566277720).

Almost surely, 2^2217921023 is an apocalyptic number.

2217921023 is a deficient number, since it is larger than the sum of its proper divisors (47189857).

2217921023 is an equidigital number, since it uses as much as digits as its factorization.

2217921023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47189856.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2217921023 is about 47094.8088752890. The cubic root of 2217921023 is about 1304.1134053250.

The spelling of 2217921023 in words is "two billion, two hundred seventeen million, nine hundred twenty-one thousand, twenty-three".