2211140660 has 24 divisors (see below), whose sum is σ = 4756650696. Its totient is φ = 862883840.

The previous prime is 2211140623. The next prime is 2211140663. The reversal of 2211140660 is 660411122.

It can be written as a sum of positive squares in 4 ways, for example, as 125574436 + 2085566224 = 11206^2 + 45668^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211140663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1347437 + ... + 1349076.

It is an arithmetic number, because the mean of its divisors is an integer number (198193779).

Almost surely, 2^2211140660 is an apocalyptic number.

2211140660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211140660 is an abundant number, since it is smaller than the sum of its proper divisors (2545510036).

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

2211140660 is a wasteful number, since it uses less digits than its factorization.

2211140660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696563 (or 2696561 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2211140660 is about 47022.7674642827. The cubic root of 2211140660 is about 1302.7831222764.

Adding to 2211140660 its reverse (660411122), we get a palindrome (2871551782).

The spelling of 2211140660 in words is "two billion, two hundred eleven million, one hundred forty thousand, six hundred sixty".