2113213140 has 72 divisors (see below), whose sum is σ = 6445988640. Its totient is φ = 560366784.

The previous prime is 2113213129. The next prime is 2113213183. The reversal of 2113213140 is 413123112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 574 + ... + 65013.

It is an arithmetic number, because the mean of its divisors is an integer number (89527620).

Almost surely, 2^2113213140 is an apocalyptic number.

2113213140 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 2113213140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3222994320).

2113213140 is an abundant number, since it is smaller than the sum of its proper divisors (4332775500).

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

2113213140 is a wasteful number, since it uses less digits than its factorization.

2113213140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65781 (or 65776 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2113213140 is about 45969.6980629632. The cubic root of 2113213140 is about 1283.2593407987.

Adding to 2113213140 its reverse (413123112), we get a palindrome (2526336252).

The spelling of 2113213140 in words is "two billion, one hundred thirteen million, two hundred thirteen thousand, one hundred forty".