2216491905 has 16 divisors (see below), whose sum is σ = 3546970560. Its totient is φ = 1181934528.

The previous prime is 2216491897. The next prime is 2216491933. The reversal of 2216491905 is 5091946122.

It is not a de Polignac number, because 2216491905 - 2³ = 2216491897 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175534 + ... + 187736.

It is an arithmetic number, because the mean of its divisors is an integer number (221685660).

Almost surely, 2^2216491905 is an apocalyptic number.

It is an amenable number.

2216491905 is a deficient number, since it is larger than the sum of its proper divisors (1330478655).

2216491905 is a wasteful number, since it uses less digits than its factorization.

2216491905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24320.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 2216491905 is about 47079.6336540547. The cubic root of 2216491905 is about 1303.8332432025.

The spelling of 2216491905 in words is "two billion, two hundred sixteen million, four hundred ninety-one thousand, nine hundred five".