2211166140 has 96 divisors (see below), whose sum is σ = 6420363264. Its totient is φ = 568001280.

The previous prime is 2211166123. The next prime is 2211166147. The reversal of 2211166140 is 416611122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2211166140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211166147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 419602 + ... + 424838.

It is an arithmetic number, because the mean of its divisors is an integer number (66878784).

Almost surely, 2^2211166140 is an apocalyptic number.

2211166140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2211166140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3210181632).

2211166140 is an abundant number, since it is smaller than the sum of its proper divisors (4209197124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2211166140 is a wasteful number, since it uses less digits than its factorization.

2211166140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5507 (or 5505 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2211166140 is about 47023.0383960884. The cubic root of 2211166140 is about 1302.7881264486.

Adding to 2211166140 its reverse (416611122), we get a palindrome (2627777262).

The spelling of 2211166140 in words is "two billion, two hundred eleven million, one hundred sixty-six thousand, one hundred forty".