2211213240 has 192 divisors, whose sum is σ = 7453274400. Its totient is φ = 568083456.

The previous prime is 2211213197. The next prime is 2211213241. The reversal of 2211213240 is 423121122.

It is a happy number.

2211213240 is a `hidden beast` number, since 2 + 211 + 213 + 240 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211213241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1451119 + ... + 1452641.

Almost surely, 2^2211213240 is an apocalyptic number.

2211213240 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 2211213240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3726637200).

2211213240 is an abundant number, since it is smaller than the sum of its proper divisors (5242061160).

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

2211213240 is a wasteful number, since it uses less digits than its factorization.

2211213240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2211213240 is about 47023.5392117607. The cubic root of 2211213240 is about 1302.7973766031.

Adding to 2211213240 its reverse (423121122), we get a palindrome (2634334362).

The spelling of 2211213240 in words is "two billion, two hundred eleven million, two hundred thirteen thousand, two hundred forty".