2131113240 has 160 divisors (see below), whose sum is σ = 7219024560. Its totient is φ = 563846400.

The previous prime is 2131113221. The next prime is 2131113253. The reversal of 2131113240 is 423111312.

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 39 ways as a sum of consecutive naturals, for example, 421930 + ... + 426950.

Almost surely, 2^2131113240 is an apocalyptic number.

2131113240 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 2131113240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3609512280).

2131113240 is an abundant number, since it is smaller than the sum of its proper divisors (5087911320).

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

2131113240 is a wasteful number, since it uses less digits than its factorization.

2131113240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5175 (or 5162 counting only the distinct ones).

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

The square root of 2131113240 is about 46163.9820639424. The cubic root of 2131113240 is about 1286.8724668646.

Adding to 2131113240 its reverse (423111312), we get a palindrome (2554224552).

The spelling of 2131113240 in words is "two billion, one hundred thirty-one million, one hundred thirteen thousand, two hundred forty".