2217858993 has 24 divisors (see below), whose sum is σ = 3670680000. Its totient is φ = 1264076064.

The previous prime is 2217858989. The next prime is 2217859057. The reversal of 2217858993 is 3998587122.

It is not a de Polignac number, because 2217858993 - 2² = 2217858989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2217858943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20743 + ... + 69756.

It is an arithmetic number, because the mean of its divisors is an integer number (152945000).

Almost surely, 2^2217858993 is an apocalyptic number.

It is an amenable number.

2217858993 is a deficient number, since it is larger than the sum of its proper divisors (1452821007).

2217858993 is a wasteful number, since it uses less digits than its factorization.

2217858993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90901 (or 90898 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 2217858993 is about 47094.1503055316. The cubic root of 2217858993 is about 1304.1012475568.

The spelling of 2217858993 in words is "two billion, two hundred seventeen million, eight hundred fifty-eight thousand, nine hundred ninety-three".