2217680942 has 4 divisors (see below), whose sum is σ = 3326521416. Its totient is φ = 1108840470.

The previous prime is 2217680929. The next prime is 2217680987. The reversal of 2217680942 is 2490867122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2490867122 = 2 ⋅1245433561.

It is a self number, because there is not a number n which added to its sum of digits gives 2217680942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554420234 + ... + 554420237.

It is an arithmetic number, because the mean of its divisors is an integer number (831630354).

Almost surely, 2^2217680942 is an apocalyptic number.

2217680942 is a deficient number, since it is larger than the sum of its proper divisors (1108840474).

2217680942 is a wasteful number, since it uses less digits than its factorization.

2217680942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108840473.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 2217680942 is about 47092.2598948065. The cubic root of 2217680942 is about 1304.0663486226.

The spelling of 2217680942 in words is "two billion, two hundred seventeen million, six hundred eighty thousand, nine hundred forty-two".