2211319987 has 4 divisors (see below), whose sum is σ = 2214014256. Its totient is φ = 2208625720.

The previous prime is 2211319973. The next prime is 2211319991. The reversal of 2211319987 is 7899131122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7899131122 = 2 ⋅3949565561.

It is a cyclic number.

It is not a de Polignac number, because 2211319987 - 2¹⁵ = 2211287219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211319927) 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, 1345903 + ... + 1347544.

It is an arithmetic number, because the mean of its divisors is an integer number (553503564).

Almost surely, 2^2211319987 is an apocalyptic number.

2211319987 is a deficient number, since it is larger than the sum of its proper divisors (2694269).

2211319987 is an equidigital number, since it uses as much as digits as its factorization.

2211319987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694268.

The product of its digits is 54432, while the sum is 43.

The square root of 2211319987 is about 47024.6742359796. The cubic root of 2211319987 is about 1302.8183405806.

The spelling of 2211319987 in words is "two billion, two hundred eleven million, three hundred nineteen thousand, nine hundred eighty-seven".