2178222073 has 4 divisors (see below), whose sum is σ = 2292865360. Its totient is φ = 2063578788.

The previous prime is 2178222043. The next prime is 2178222083. The reversal of 2178222073 is 3702228712.

It is a happy number.

2178222073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2178222073 - 2⁵ = 2178222041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2178222023) 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, 57321615 + ... + 57321652.

It is an arithmetic number, because the mean of its divisors is an integer number (573216340).

Almost surely, 2^2178222073 is an apocalyptic number.

It is an amenable number.

2178222073 is a deficient number, since it is larger than the sum of its proper divisors (114643287).

2178222073 is a wasteful number, since it uses less digits than its factorization.

2178222073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114643286.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 2178222073 is about 46671.4267298526. The cubic root of 2178222073 is about 1296.2856644415.

The spelling of 2178222073 in words is "two billion, one hundred seventy-eight million, two hundred twenty-two thousand, seventy-three".