2211727985 has 32 divisors (see below), whose sum is σ = 2792361600. Its totient is φ = 1680125440.

The previous prime is 2211727981. The next prime is 2211728009. The reversal of 2211727985 is 5897271122.

It is not a de Polignac number, because 2211727985 - 2² = 2211727981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2211727981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1293311 + ... + 1295019.

It is an arithmetic number, because the mean of its divisors is an integer number (87261300).

Almost surely, 2^2211727985 is an apocalyptic number.

It is an amenable number.

2211727985 is a deficient number, since it is larger than the sum of its proper divisors (580633615).

2211727985 is a wasteful number, since it uses less digits than its factorization.

2211727985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921.

The product of its digits is 141120, while the sum is 44.

The square root of 2211727985 is about 47029.0121627065. The cubic root of 2211727985 is about 1302.8984608395.

The spelling of 2211727985 in words is "two billion, two hundred eleven million, seven hundred twenty-seven thousand, nine hundred eighty-five".