2218615273 has 4 divisors (see below), whose sum is σ = 2535560320. Its totient is φ = 1901670228.

The previous prime is 2218615253. The next prime is 2218615309. The reversal of 2218615273 is 3725168122.

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 2218615273 - 2⁵ = 2218615241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2218615253) 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, 158472513 + ... + 158472526.

It is an arithmetic number, because the mean of its divisors is an integer number (633890080).

Almost surely, 2^2218615273 is an apocalyptic number.

It is an amenable number.

2218615273 is a deficient number, since it is larger than the sum of its proper divisors (316945047).

2218615273 is an equidigital number, since it uses as much as digits as its factorization.

2218615273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316945046.

The product of its digits is 40320, while the sum is 37.

The square root of 2218615273 is about 47102.1790684890. The cubic root of 2218615273 is about 1304.2494616095.

The spelling of 2218615273 in words is "two billion, two hundred eighteen million, six hundred fifteen thousand, two hundred seventy-three".